# 100 leading companies with in-house R&D in Japan

Tamtam tracks 287 companies with in-house R&D headquartered in Japan. This list ranks the 100 largest by number of employees on LinkedIn, led by SUMITOMO ELECTRIC INTERCON'T PROD (M) SB, NTT DATA, Inc. and Komatsu. Their median headcount is 3,901. Half of them were founded in 1937 or later. The most common headquarters are Tokyo (20) and Osaka (6).

These Japanese companies with in-house R&D are primarily large, established firms, many founded in the early to mid-20th century. The list includes major players in manufacturing, such as Sumitomo Electric, a diversified manufacturer, and Toyota Motor Corporation, a global automotive leader. Other notable companies are NTT DATA, a global IT services provider, and Takeda, a pharmaceutical manufacturer. Many of these companies are headquartered in Tokyo, reflecting a concentration of corporate activity in the capital.

The companies demonstrate a mix of sectors, with a strong presence in manufacturing and IT services. Motor vehicle manufacturing is well-represented by companies like Nissan Motor Corporation and Honda, while electronics and appliances are covered by Panasonic and Sony. The presence of UNIQLO indicates a significant retail presence with an R&D focus, suggesting a broad application of research and development across various industries in Japan.

🇯🇵 Japan · 100 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [SUMITOMO ELECTRIC INTERCON'T PROD (M) SB](https://www.tamtam.ai/c/sumitomo-electric) (sumitomoelectric.com)<br>A global network of 414 companies in 40 countries, originally focused on copper wire production, now diversified into automotive, infocommunications, electronics, environment, energy, and industrial materials | Manufacturing | 🇯🇵 Osaka | 289,000 | 1897 |
| 2 | [NTT DATA, Inc.](https://www.tamtam.ai/c/ntt-data-inc) (global.ntt)<br>A global IT services provider offering a wide range of business and technology solutions as it transitions to NTT DATA | IT Services and IT Consulting | 🇯🇵 Tokyo | 140,000 |  |
| 3 | [Komatsu](https://www.tamtam.ai/c/komatsu) (komatsu.jp)<br>Innovating manufacturing and technology to create value for a sustainable future where people, businesses, and the planet flourish together | Machinery Manufacturing | 🇯🇵 Tokyo | 60,000 | 1921 |
| 4 | [NTT DATA](https://www.tamtam.ai/c/ntt-data) (nttdata.com)<br>Providing IT and business consulting, digital transformation, managed services, and industry solutions to clients worldwide for long-term success. | IT Services and IT Consulting | 🇯🇵 Tokyo | 48,385 |  |
| 5 | [Nissan Motor Corporation](https://www.tamtam.ai/c/nissan-motor-corporation) (nissan-global.com)<br>A global car manufacturer offering a range of vehicles under the Nissan and INFINITI brands, dedicated to sustainable mobility Follow on social media for updates | Motor Vehicle Manufacturing | 🇯🇵 Yokohama-Shi | 47,419 | 1933 |
| 6 | [Hitachi](https://www.tamtam.ai/c/hitachi) (hitachi.com)<br>A technology and innovation company committed to creating a more sustainable society through advanced social infrastructure systems and improving quality of life | IT Services and IT Consulting | 🇯🇵 Tokyo | 40,513 | 1910 |
| 7 | [Toyota Motor Corporation](https://www.tamtam.ai/c/toyota-motor-corporation) (global.toyota)<br>Global automotive industry leader manufacturing vehicles in twenty-seven countries and marketing products across over one hundred seventy regions with hundreds of thousands employees. | Motor Vehicle Manufacturing | 🇯🇵 Toyota City | 38,930 | 1937 |
| 8 | [Takeda](https://www.tamtam.ai/c/takeda) (takeda.com)<br>The company is committed to transforming lives by advancing science, focusing on patient needs, and setting new standards in healthcare | Pharmaceutical Manufacturing | 🇯🇵 Tokyo | 37,267 | 1781 |
| 9 | [Kao EMEA & Americas](https://www.tamtam.ai/c/kao-emea-and-americas) (kao.com)<br>Leading manufacturer of hygiene, beauty, and health products with premium brands in consumer care, salon, cosmetics, and luxury skincare sectors. | Personal Care Product Manufacturing | 🇯🇵 Tokyo | 34,000 |  |
| 10 | [Japan Tobacco Inc. (JT)](https://www.tamtam.ai/c/japan-tobacco-inc-jt) (jt.com)<br>A global company in tobacco, pharmaceutical, and processed food sectors, focusing on sustainability and stakeholder value through innovation and responsible products | Tobacco Manufacturing | 🇯🇵 Minato-ku | 33,449 |  |
| 11 | [Panasonic](https://www.tamtam.ai/c/panasonic) (holdings.panasonic)<br>A company committed to enhancing well-being and society through sustainable solutions, offering superior products and services to help people live their best | Appliances, Electrical, and Electronics Manufacturing | 🇯🇵 Kadoma-shi | 30,689 | 1918 |
| 12 | [Honda](https://www.tamtam.ai/c/honda) (global.honda)<br>A global leader in mobility solutions, specializing in automobiles, motorcycles, power products, and aircraft manufacturing | Motor Vehicle Manufacturing | 🇯🇵 Minato-ku | 25,208 |  |
| 13 | [Sony](https://www.tamtam.ai/c/sony) (sony.com)<br>Creates groundbreaking technology, entertainment, and services across various industries, aiming to evoke emotion and push boundaries for people worldwide. | Entertainment Providers | 🇯🇵 Tokyo | 24,935 | 1946 |
| 14 | [UNIQLO](https://www.tamtam.ai/c/uniqlo) (fastretailing.com)<br>A leading Japanese retail holding company offering high-quality, innovative apparel under the concept of LifeWear in over 25 markets worldwide | Retail | 🇯🇵 Tokyo | 19,984 | 1984 |
| 15 | [Marelli](https://www.tamtam.ai/c/marelli) (marelli.com)<br>A global supplier to the automotive sector focused on innovation, manufacturing excellence, and creating a safer, greener, and better-connected world | Motor Vehicle Manufacturing | 🇯🇵 Saitama City | 18,637 | 2019 |
| 16 | [NEC Corporation](https://www.tamtam.ai/c/nec-corporation) (nec.com)<br>An industry leader in IT and network integration, focusing on sustainable solutions for safety, security, and efficiency in a rapidly changing world | IT Services and IT Consulting | 🇯🇵 Tokyo | 17,980 | 1899 |
| 17 | [Mitsubishi Heavy Industries](https://www.tamtam.ai/c/mitsubishi-heavy-industries) (mhi.com)<br>Delivers innovative integrated solutions across power, energy, machinery, infrastructure, aerospace, and defense, advancing lives and environmental sustainability globally. | Industrial Machinery Manufacturing | 🇯🇵 Chiyoda-ku | 15,162 |  |
| 18 | [Olympus Corporation](https://www.tamtam.ai/c/olympus-corporation) (olympus-global.com)<br>A global company dedicated to developing medical solutions to improve lives by detecting, preventing, and treating diseases while ensuring public safety | Medical Equipment Manufacturing | 🇯🇵 Shinjuku-ku | 13,679 | 1919 |
| 19 | [TDK](https://www.tamtam.ai/c/tdk) (tdk.com)<br>A global leader in electronic solutions, specializing in passive components, sensors, power supplies, and energy devices for automotive, industrial, and consumer electronics markets | Appliances, Electrical, and Electronics Manufacturing | 🇯🇵 Chuo-ku | 13,086 | 1935 |
| 20 | [Yamaha Corporation](https://www.tamtam.ai/c/yamaha-corporation) (yamaha.com)<br>Manufacturer and provider of musical instruments, sound-related products, and services focused on enriching lives through music and culture. | Musicians | 🇯🇵 Hamamatsu | 13,023 |  |
| 21 | [Astellas Pharma](https://www.tamtam.ai/c/astellas-pharma) (astellas.com)<br>Development and provision of innovative therapies in oncology, ophthalmology, urology, immunology, and women's health addressing unmet medical needs. | Pharmaceutical Manufacturing | 🇯🇵 Chuo-ku | 12,472 |  |
| 22 | [Renesas Electronics](https://www.tamtam.ai/c/renesas-electronics) (renesas.com)<br>It provides embedded semiconductor solutions for automotive, industrial, infrastructure, and IoT industries, focusing on quality and user experience. | Semiconductor Manufacturing | 🇯🇵 Koto-ku | 11,993 |  |
| 23 | [Nidec Corporation Global](https://www.tamtam.ai/c/nidec-corporation-global) (nidec.com)<br>Designing, producing, and marketing electric motors and their associated components and parts are core activities across various industries including automotive, home appliances, and industrial equipment. | Appliances, Electrical, and Electronics Manufacturing | 🇯🇵 | 11,960 |  |
| 24 | [Rakuten](https://www.tamtam.ai/c/rakuten) (rakuten.com)<br>A global ecommerce company offering a wide range of consumer and business services, expanding worldwide and focused on creating a better future | Software Development | 🇯🇵 Setagaya-ku | 11,289 | 1997 |
| 25 | [Astemo Ltd.](https://www.tamtam.ai/c/astemo-ltd) (astemo.com)<br>Development and supply of automotive powertrain, chassis, AD/ADAS, and motorcycle systems focusing on safety, efficiency, and environmental sustainability. | Motor Vehicle Manufacturing | 🇯🇵 Chiyoda-ku | 10,781 |  |
| 26 | [LIXIL](https://www.tamtam.ai/c/lixil) (lixil.com)<br>Development and manufacturing of innovative water and housing products, improving home quality and accessibility worldwide with trusted brands. | Manufacturing | 🇯🇵 Shinagawa | 10,685 |  |
| 27 | [Suntory Holdings Limited](https://www.tamtam.ai/c/suntory-holdings-limited) (suntory.com)<br>A global consumer products company offering a diverse portfolio of beverages, wellness products, and operating a flower business, committed to social responsibility and growth | Food and Beverage Services | 🇯🇵 Minato-ku | 10,535 | 1899 |
| 28 | [Asahi Kasei](https://www.tamtam.ai/c/asahi-kasei) (asahi-kasei.com)<br>Global company providing healthcare products, residential solutions, and advanced materials to improve life quality and support sustainable development worldwide. | Chemical Manufacturing | 🇯🇵 Tokyo | 10,369 | 1922 |
| 29 | [Shiseido](https://www.tamtam.ai/c/shiseido) (shiseido.com)<br>A top cosmetics company with international brands in 120 countries, offering beauty solutions for a sustainable society through innovative products and new lifestyle creations | Personal Care Product Manufacturing | 🇯🇵 Minato-ku | 8,698 | 1872 |
| 30 | [Yokogawa](https://www.tamtam.ai/c/yokogawa) (yokogawa.com)<br>Provides measurement, control, information solutions across diverse industries; optimizes production, assets, supply chains with digital technologies; enables autonomous operations. | Automation Machinery Manufacturing | 🇯🇵 Tokyo | 8,675 |  |
| 31 | [TrendAI](https://www.tamtam.ai/c/trendai) (trendmicro.com)<br>Global cybersecurity company providing AI-powered protection and risk management for enterprises, governments, and consumers across diverse digital environments. | Computer and Network Security | 🇯🇵 Tokyo | 8,060 |  |
| 32 | [Murata](https://www.tamtam.ai/c/murata) (murata.com)<br>Global leader in designing, manufacturing, and supplying advanced electronic components and modules for diverse devices and industries worldwide. | Appliances, Electrical, and Electronics Manufacturing | 🇯🇵 Nagaokakyo-shi | 7,404 | 1944 |
| 33 | [KEYENCE CORPORATION](https://www.tamtam.ai/c/keyence-corporation) (keyence.com)<br>Development and manufacturing of factory automation equipment including sensors, measuring instruments, vision systems, laser markers, and digital microscopes worldwide. | Automation Machinery Manufacturing | 🇯🇵 Osaka | 6,685 | 1974 |
| 34 | [Canon Inc.](https://www.tamtam.ai/c/canon-inc) (global.canon)<br>Manufacturing and marketing of imaging equipment, printers, cameras, medical systems, and semiconductor manufacturing equipment with global presence and R&D. | Retail Office Equipment | 🇯🇵 Ohta-ku | 6,597 | 1937 |
| 35 | [NTT](https://www.tamtam.ai/c/ntt-chiyoda-ku) (global.ntt)<br>Global technology company offering mobile, infrastructure, consulting, and cloud services with deep industry expertise, serving Fortune Global 100 companies and millions of clients worldwide | IT Services and IT Consulting | 🇯🇵 Chiyoda-ku | 6,355 | 1985 |
| 36 | [MODEC](https://www.tamtam.ai/c/modec) (modec.com)<br>A global leader in providing advanced technology solutions for floating offshore oil and gas projects, with a focus on sustainability and community development | Oil and Gas | 🇯🇵 Chuo-ku | 6,334 | 1968 |
| 37 | [Tokyo Electron](https://www.tamtam.ai/c/tokyo-electron) (tel.com)<br>A leading semiconductor manufacturing equipment company providing high-performance products and services worldwide, focusing on customer satisfaction, innovation, and technology advancement | Semiconductor Manufacturing | 🇯🇵 Minato-ku | 6,269 |  |
| 38 | [Hitachi Construction Machinery](https://www.tamtam.ai/c/hitachi-construction-machinery) (hitachicm.com)<br>Global construction machinery company prioritizing environmentally friendly activities, providing solutions for construction and mining needs, promoting sustainability and social development | Machinery Manufacturing | 🇯🇵 Taito-ku | 5,800 | 1970 |
| 39 | [AGC Group](https://www.tamtam.ai/c/agc-group) (agc.com)<br>supplier of flat, automotive, display glass, chemicals, ceramics, and high-tech materials with global operations and strong innovation focus | Glass, Ceramics and Concrete Manufacturing | 🇯🇵 Tokyo | 4,786 |  |
| 40 | [NSG Group](https://www.tamtam.ai/c/nsg-group) (nsg.com)<br>Manufactures glass and glazing products for architectural, automotive, and technical sectors with global operations and diverse product applications. | Glass, Ceramics and Concrete Manufacturing | 🇯🇵 Minato-ku | 4,624 | 1918 |
| 41 | [SoftBank](https://www.tamtam.ai/c/softbank) (softbank.jp)<br>Innovative company utilizing AI, IoT, and robotics to drive the Information Revolution, expanding business domains with a focus on societal impact and workstyle reform | IT Services and IT Consulting | 🇯🇵 Minato | 4,471 | 1986 |
| 42 | [ASICS](https://www.tamtam.ai/c/asics) (corp.asics.com)<br>A global company founded on the philosophy of promoting physical and mental wellbeing through sports footwear, apparel, and equipment | Retail | 🇯🇵 Chuo-ku | 4,382 | 1949 |
| 43 | [KYOCERA Global](https://www.tamtam.ai/c/kyocera-global) (global.kyocera.com)<br>Development of fine ceramics, semiconductor components, electronic devices, AI, IoT systems, and document solutions addressing critical global issues. | Appliances, Electrical, and Electronics Manufacturing | 🇯🇵 Kyoto City | 4,375 |  |
| 44 | [Mitsubishi Motors Corporation](https://www.tamtam.ai/c/mitsubishi-motors-corporation) (mitsubishi-motors.com)<br>A global automotive company with 30,000+ employees, 30 production centers worldwide, selling vehicles in 140+ countries, focusing on fulfilling customer ambitions | Motor Vehicle Manufacturing | 🇯🇵 Minato-ku | 4,282 | 1970 |
| 45 | [JGC](https://www.tamtam.ai/c/jgc) (jgc.com)<br>A global group operating in Total Engineering and Functional Materials Manufacturing, contributing to economic growth and industrial development in various countries | Oil and Gas | 🇯🇵 Minato Mirai | 4,235 | 1928 |
| 46 | [Seiko Epson Corporation](https://www.tamtam.ai/c/seiko-epson-corporation) (global.epson.com)<br>Global technology leader focused on efficient, precise innovation in printing, manufacturing, and visual solutions Committed to sustainability and addressing societal issues | Computer Hardware Manufacturing | 🇯🇵 Suwa | 4,220 |  |
| 47 | [Sysmex Corporation](https://www.tamtam.ai/c/sysmex-corporation) (sysmex.co.jp)<br>A global leader in in vitro diagnostics, dedicated to innovating personalized medicine and novel treatments to improve healthcare worldwide | Medical Equipment Manufacturing | 🇯🇵 Chuo-ku | 4,045 | 1968 |
| 48 | [Kyoto University](https://www.tamtam.ai/c/kyoto-university) (kyoto-u.ac.jp)<br>Established in 1897, providing high-quality education and research with a focus on open-minded dialogue and academic freedom | Higher Education | 🇯🇵 Kyoto | 4,004 |  |
| 49 | [Chiyoda Corporation](https://www.tamtam.ai/c/chiyoda-corporation) (chiyodacorp.com)<br>Global engineering company focused on energy and environment, aiming to be top-tier provider through innovative solutions and sustainable growth strategies | Oil and Gas | 🇯🇵 Yokohama | 3,984 | 1948 |
| 50 | [Advantest](https://www.tamtam.ai/c/advantest) (advantest.com)<br>Leading manufacturer of automatic test and measurement equipment for semiconductor design and production, serving applications such as 5G, IoT, AI, and more globally | Semiconductor Manufacturing | 🇯🇵 Tokyo | 3,901 | 1954 |
| 51 | [HORIBA](https://www.tamtam.ai/c/horiba) (horiba.com)<br>The company provides instruments and systems for various industries including automotive, medical diagnostics, semiconductor manufacturing, and scientific research with proven quality and performance | Measuring and Control Instrument Manufacturing | 🇯🇵 Kyoto | 3,531 | 1953 |
| 52 | [Toray Industries, Inc.](https://www.tamtam.ai/c/toray-industries-inc) (toray.com)<br>Development of fibers, textiles, performance chemicals, carbon fiber composites, environment engineering, pharmaceuticals, and medical products using advanced chemical technologies worldwide. | Chemical Manufacturing | 🇯🇵 Chuo-ku | 3,225 | 1926 |
| 53 | [Rakuten Symphony](https://www.tamtam.ai/c/rakuten-symphony) (rakuten.com)<br>Global B2B services provider in mobile telco industry, offering cloud-based international mobile services and innovative telco platform, with operations in 30 countries | Telecommunications | 🇯🇵 Tokyo | 3,102 |  |
| 54 | [Fast Retailing](https://www.tamtam.ai/c/fast-retailing) (fastretailing.com)<br>Global apparel retail company operating multiple brands, designing and selling innovative clothing with a focus on quality, simplicity, and longevity. | Retail | 🇯🇵 Tokyo | 3,062 | 1963 |
| 55 | [Toyo Engineering Corporation](https://www.tamtam.ai/c/toyo-engineering-corporation) (toyo-eng.com)<br>Engineering globally to construct plants, focusing on quality, safety, environment, and cost Creating sustainable solutions for energy infrastructure with innovation | Construction | 🇯🇵 Narashino | 3,002 | 1961 |
| 56 | [Kuraray](https://www.tamtam.ai/c/kuraray) (kuraray.com)<br>A global specialty chemical company, focusing on fibers, resins, chemicals, and other products for various industries, committed to innovation and addressing social issues | Chemical Manufacturing | 🇯🇵 Chiyoda-ku | 2,833 | 1926 |
| 57 | [Recruit Co.,Ltd.](https://www.tamtam.ai/c/recruit-co-ltd) (recruit.co.jp)<br>Global managing affiliate company overseeing Recruit Group's strategy, globalization, R&D for business technology, and leadership development across 28 countries | IT Services and IT Consulting | 🇯🇵 Chiyoda | 2,723 | 2012 |
| 58 | [Mitsui Chemicals Group](https://www.tamtam.ai/c/mitsui-chemicals-group) (mitsuichemicals.com)<br>A multinational chemical company, listed on the Tokyo Stock Exchange, that develops environmentally friendly materials for various industries globally | Chemical Manufacturing | 🇯🇵 Chuo | 2,715 | 1997 |
| 59 | [Kubota Corporation](https://www.tamtam.ai/c/kubota-corporation) (kubota.com)<br>Manufacture and sale of farm equipment, construction machinery, water treatment systems, pipes, pumps, and environmental engineering services globally. | Machinery Manufacturing | 🇯🇵 Osaka | 2,639 | 1890 |
| 60 | [PHC Holdings Corporation](https://www.tamtam.ai/c/phc-holdings-corporation) (phchd.com)<br>Global healthcare company specializing in diabetes management, healthcare solutions, life sciences, and diagnostics with a mission to improve lives worldwide | Medical Equipment Manufacturing | 🇯🇵 Chiyoda-ku | 2,610 | 2014 |
| 61 | [Kyowa Kirin Co., Ltd.](https://www.tamtam.ai/c/kyowa-kirin-co-ltd) (kyowakirin.com)<br>Development of novel medicines, next-generation antibodies, and cell and gene therapies targeting severe and rare diseases globally. | Pharmaceutical Manufacturing | 🇯🇵 Chiyoda-ku | 2,582 |  |
| 62 | [Panasonic Connect](https://www.tamtam.ai/c/panasonic-connect) (connect.panasonic.com)<br>A company dedicated to providing innovative B2B solutions, driving sustainability and societal advancement by connecting with customers to solve challenges and create value | Transportation, Logistics, Supply Chain and Storage | 🇯🇵 Tokyo | 2,476 | 2022 |
| 63 | [Woven by Toyota](https://www.tamtam.ai/c/woven-by-toyota)<br>Innovative global culture combining Silicon Valley innovation with Japanese quality craftsmanship to create safe and intelligent mobility experiences for customers worldwide | Software Development | 🇯🇵 Chuo-ku | 2,464 | 2023 |
| 64 | [The University of Osaka](https://www.tamtam.ai/c/the-university-of-osaka) (osaka-u.ac.jp)<br>A prestigious research university in Osaka, Japan, founded in 1931, offering a wide range of undergraduate and graduate programs and research facilities | Higher Education | 🇯🇵 Suita | 2,415 | 1931 |
| 65 | [JSP](https://www.tamtam.ai/c/jsp) (jsp.com)<br>Global provider of innovative high function, high value impact energy management materials for automotive, HVAC, packaging, sports, and consumer goods markets | Plastics Manufacturing | 🇯🇵 Tokyo | 2,380 | 1962 |
| 66 | [KONICA MINOLTA, INC.](https://www.tamtam.ai/c/konica-minolta-inc) (konicaminolta.us)<br>Development manufacturing sales multifunctional peripherals printers healthcare systems measuring instruments electronic materials optical products functional films | Appliances, Electrical, and Electronics Manufacturing | 🇯🇵 Chiyoda-ku | 2,344 | 1936 |
| 67 | [Tohoku University](https://www.tamtam.ai/c/tohoku-university) (tohoku.ac.jp)<br>A research university focused on developing new technologies to make the world safer, more environmentally friendly, and improve quality of life | Higher Education | 🇯🇵 Sendai | 2,298 | 1907 |
| 68 | [Sharp](https://www.tamtam.ai/c/sharp) (global.sharp)<br>A company in Japan manufacturing and selling telecommunications equipment, electronics, and components, committed to innovation, employee growth, and customer prosperity through sincerity and creativity | Consumer Electronics | 🇯🇵 Osaka | 2,207 | 1912 |
| 69 | [Toshiba Corporation](https://www.tamtam.ai/c/toshiba-corporation) (global.toshiba)<br>A global technology company specializing in energy, social infrastructure, electronic devices, and digital solutions, committed to creating a sustainable future | Appliances, Electrical, and Electronics Manufacturing | 🇯🇵 Minato-ku | 2,021 | 1875 |
| 70 | [Daifuku](https://www.tamtam.ai/c/daifuku) (daifuku.com)<br>Provider of comprehensive material handling solutions to enhance global competitiveness, addressing logistics challenges with technology and expertise across various industries worldwide | Automation Machinery Manufacturing | 🇯🇵 Osaka | 1,932 | 1937 |
| 71 | [Daimler Truck Asia](https://www.tamtam.ai/c/daimler-truck-asia) (asia.daimlertruck.com)<br>A company developing mobility solutions for a better life and planet, combining strengths to provide value products globally while focusing on sustainability | Motor Vehicle Manufacturing | 🇯🇵 Kawasaki | 1,907 |  |
| 72 | [Mitsubishi Chemical Group](https://www.tamtam.ai/c/mitsubishi-chemical-group) (mcgc.com)<br>Leading innovative solutions in mobility, digital, medical, and food sectors to enhance well-being of people and the planet. | Chemical Manufacturing | 🇯🇵 Chiyoda-ku | 1,904 |  |
| 73 | [Teijin Limited](https://www.tamtam.ai/c/teijin-limited) (teijin.com)<br>Innovative global group specializing in materials, healthcare, and IT solutions, focused on environmental value, safety, and health consciousness | Chemical Manufacturing | 🇯🇵 Chiyoda-ku | 1,882 |  |
| 74 | [Aernnova Aerospace](https://www.tamtam.ai/c/aernnova-aerospace) (aernnova.com)<br>A leading Aerostructures company specializing in design, manufacturing, and support for Empennages, Wings, and Rear Fuselages Offers full product lifecycle management | Aviation and Aerospace Component Manufacturing | 🇯🇵 Minano | 1,880 | 1993 |
| 75 | [ALPS ALPINE](https://www.tamtam.ai/c/alps-alpine) (alpsalpine.com)<br>A global manufacturer of electronic components and automotive infotainment systems, supplying a wide range of products and solutions worldwide | Appliances, Electrical, and Electronics Manufacturing | 🇯🇵 Ota-ku | 1,879 | 1948 |
| 76 | [AESC](https://www.tamtam.ai/c/aesc) (aesc-group.com)<br>A global leader in high-performance battery development and manufacturing for electric vehicles and energy storage systems, driving the transition to clean energy solutions | Manufacturing | 🇯🇵 Yokohama | 1,862 |  |
| 77 | [SHIMADZU CORPORATION](https://www.tamtam.ai/c/shimadzu-corporation) (shimadzu.com)<br>Providing world-class analytical instruments, medical imaging systems, aircraft equipment, and industrial machinery for health, safety, and industry advancement. | Biotechnology Research | 🇯🇵 Kyoto | 1,858 | 1875 |
| 78 | [Santen](https://www.tamtam.ai/c/santen) (santen.com)<br>This specialized company in ophthalmology conducts research, development, marketing, and sales of pharmaceuticals, over-the-counter products, and medical devices worldwide | Pharmaceutical Manufacturing | 🇯🇵 Osaka | 1,848 |  |
| 79 | [Daiichi Sankyo Japan](https://www.tamtam.ai/c/daiichi-sankyo-japan) (daiichisankyo.com)<br>An innovative global healthcare company with over 120 years of experience, focusing on discovering and delivering new standards of care for cancer, cardiovascular, and other diseases | Pharmaceutical Manufacturing | 🇯🇵 Tokyo | 1,811 | 2007 |
| 80 | [Mercari, Inc.](https://www.tamtam.ai/c/mercari-inc) (careers.mercari.com)<br>A C2C marketplace app allowing easy buying and selling of items with affordable shipping options, user-friendly experience, and additional services | Software Development | 🇯🇵 Minato | 1,791 | 2013 |
| 81 | [Hitachi Automotive Systems](https://www.tamtam.ai/c/hitachi-automotive-systems) (hitachi-automotive.co.jp)<br>Development and supply of powertrain, chassis, and ADAS technologies integrating IoT, AI, and connectivity for sustainable mobility solutions. | Motor Vehicle Manufacturing | 🇯🇵 Chiyoda-ku | 1,761 | 2009 |
| 82 | [Kurita Group](https://www.tamtam.ai/c/kurita-group) (kurita.co.jp)<br>A global leader in water treatment solutions, offering chemicals, facilities, and services worldwide to create new value for customers and society | Environmental Services | 🇯🇵 Tokyo | 1,754 | 1949 |
| 83 | [TOPPAN Group](https://www.tamtam.ai/c/toppan-group) (holdings.toppan.com)<br>Global provider delivering sustainable solutions in printing, communications, security, packaging, electronics, and digital transformation, with expertise to address diverse business challenges | Printing Services | 🇯🇵 Bunkyo-ku | 1,744 |  |
| 84 | [FURUKAWA AUTOMOTIVE SYSTEMS INC.](https://www.tamtam.ai/c/furukawa-automotive-systems-inc) (furukawaas.co.jp)<br>An automotive organization headquartered in Osaka, Japan, specializing in automotive systems | Motor Vehicle Manufacturing | 🇯🇵 Settsu | 1,741 |  |
| 85 | [Anritsu](https://www.tamtam.ai/c/anritsu) (anritsu.com)<br>A pioneer in communications equipment since 1895, offering test tools, quality assurance equipment, environmental measurement, and sensing devices | Appliances, Electrical, and Electronics Manufacturing | 🇯🇵 Atsugi-shi | 1,733 | 1895 |
| 86 | [Fujifilm Group](https://www.tamtam.ai/c/fujifilm-group) (holdings.fujifilm.com)<br>A holding company overseeing FUJIFILM Group's diverse businesses, adapting to digitalization by expanding into multiple growth fields beyond traditional photography materials | Chemical Manufacturing | 🇯🇵 Minato-ku | 1,715 | 1934 |
| 87 | [Resonac](https://www.tamtam.ai/c/resonac) (resonac.com)<br>This company specializes in cutting-edge functional materials technologies and aims to co-create a better society through innovative solutions in the chemical industry | Chemical Manufacturing | 🇯🇵 Minato-ku | 1,691 | 1939 |
| 88 | [NHK, Japan Broadcasting Corporation](https://www.tamtam.ai/c/nhk-japan-broadcasting-corporation) (nhk.or.jp)<br>This company is Japan's public broadcaster, providing radio and television services independently funded by receiving fees from households with television sets | Broadcast Media Production and Distribution | 🇯🇵 Shibuya-ku; | 1,684 | 1925 |
| 89 | [Fujikura Ltd.](https://www.tamtam.ai/c/fujikura-ltd) (fujikura.co.jp)<br>Aiming for customer appreciation, Fujikura Group delivers reliable wires, cables, and products in telecommunications, energy, electronics, and automotive sectors | Appliances, Electrical, and Electronics Manufacturing | 🇯🇵 Koto-ku | 1,657 | 1885 |
| 90 | [Sumitomo Chemical](https://www.tamtam.ai/c/sumitomo-chemical) (sumitomo-chem.co.jp)<br>A company originally addressing air pollution from copper smelting, now focuses on diverse businesses driven by technological innovation to benefit society | Chemical Manufacturing | 🇯🇵 Chuo-ku | 1,636 | 1913 |
| 91 | [Mitsubishi Power](https://www.tamtam.ai/c/mitsubishi-power) (power.mhi.com)<br>Designs, manufactures, and maintains equipment and systems for decarbonization and reliable power, including gas turbines, fuel cells, and air quality control systems, globally. | Oil and Gas | 🇯🇵 Chiyoda-ku | 1,635 |  |
| 92 | [Takasago International Corporation](https://www.tamtam.ai/c/takasago-international-corporation) (takasago.com)<br>A global leader in flavor, fragrance, and aroma ingredients, specializing in developing innovative products for food, beverage, and personal care industries worldwide | Chemical Manufacturing | 🇯🇵 Nissey Aroma Square 17F 5-37-1 Kamata | 1,626 | 1920 |
| 93 | [Fuji Electric Co., Ltd.](https://www.tamtam.ai/c/fuji-electric-co-ltd) (fujielectric.com)<br>The company is dedicated to integrating power semiconductor and electronics technologies with IoT to create sustainable solutions for industrial and social infrastructure sectors | Appliances, Electrical, and Electronics Manufacturing | 🇯🇵 Shinagawa | 1,598 | 1923 |
| 94 | [UD Trucks](https://www.tamtam.ai/c/ud-trucks) (udtrucks.com)<br>A leading Japanese provider of commercial vehicle solutions, dedicated to innovation and providing dependable trucks and services worldwide for smart logistics | Motor Vehicle Manufacturing | 🇯🇵 Ageo city | 1,582 |  |
| 95 | [SAKATA INX CORPORATION](https://www.tamtam.ai/c/sakata-inx-corporation) (inx.co.jp)<br>Specializing in manufacturing printing inks and functional materials, we innovate with earth-friendly technology to enhance life with color and happiness | Chemical Manufacturing | 🇯🇵 Osaka-shi | 1,567 | 1896 |
| 96 | [Hokkaido University](https://www.tamtam.ai/c/hokkaido-university) (global.hokudai.ac.jp)<br>A prestigious comprehensive university in Japan, focusing on research in natural sciences, social sciences, and humanities with diverse international programs and support | Higher Education | 🇯🇵 Sapporo | 1,564 | 1876 |
| 97 | [Ajinomoto Co., Inc.](https://www.tamtam.ai/c/ajinomoto-co-inc) (ajinomoto.com)<br>Global food and amino acid business, uses bioscience and fine chemical technologies to support healthy lives through sustainable solutions. | Food and Beverage Services | 🇯🇵 Chuo-ku | 1,523 |  |
| 98 | [Penta-Ocean Construction Company Limited](https://www.tamtam.ai/c/penta-ocean-construction-company-limited) (penta-ocean.co.jp)<br>A Japanese construction firm specializing in marine works and land reclamation, with offices in multiple countries and involvement in various major projects globally | Construction | 🇯🇵 Tokyo | 1,503 | 1896 |
| 99 | [SEGA](https://www.tamtam.ai/c/sega) (sega.co.jp)<br>The company engages in planning, developing, and selling games for consoles, PCs, and smartphones, as well as arcade machines and character products | Entertainment Providers | 🇯🇵 | 1,487 | 1960 |
| 100 | [Kajima](https://www.tamtam.ai/c/kajima) (kajima.com)<br>General contractor specializing in high-rise, earthquake-resistant buildings, large civil engineering projects, real estate, and office automation equipment businesses. | Construction | 🇯🇵 | 1,484 |  |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.

## More company lists in Japan

- [The largest companies in Japan](https://www.tamtam.ai/l/largest-companies-japan) (932)
- [Multinational companies in Japan](https://www.tamtam.ai/l/multinational-companies-japan) (470)
- [Manufacturers in Japan](https://www.tamtam.ai/l/manufacturers-japan) (224)
- [Publicly traded companies in Japan](https://www.tamtam.ai/l/publicly-traded-companies-japan) (209)
- [Corporate groups and holding companies in Japan](https://www.tamtam.ai/l/holding-companies-japan) (181)
- [Hardware manufacturers in Japan](https://www.tamtam.ai/l/hardware-companies-japan) (142)
- [IT Services and IT Consulting companies in Japan](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-japan) (105)
- [Education providers in Japan](https://www.tamtam.ai/l/education-companies-japan) (75)
- [Companies with a mobile app in Japan](https://www.tamtam.ai/l/companies-with-mobile-app-japan) (69)
- [Professional services firms in Japan](https://www.tamtam.ai/l/professional-services-firms-japan) (69)
- [Electronics and semiconductor companies in Japan](https://www.tamtam.ai/l/electronics-companies-japan) (68)
- [IT services companies in Japan](https://www.tamtam.ai/l/it-services-companies-japan) (64)
- [AI companies in Japan](https://www.tamtam.ai/l/ai-companies-japan) (63)
- [Automotive manufacturers and suppliers in Japan](https://www.tamtam.ai/l/automotive-companies-japan) (60)
- [Critical infrastructure operators in Japan](https://www.tamtam.ai/l/critical-infrastructure-operators-japan) (59)
- [Higher Education companies in Japan](https://www.tamtam.ai/l/higher-education-companies-japan) (57)
- [Research institutes in Japan](https://www.tamtam.ai/l/research-institutes-japan) (55)
- [Consulting firms in Japan](https://www.tamtam.ai/l/consulting-firms-japan) (52)
- [Chemical companies in Japan](https://www.tamtam.ai/l/chemical-companies-japan) (51)
- [Financial services firms in Japan](https://www.tamtam.ai/l/financial-services-firms-japan) (50)
- [Public sector organisations in Japan](https://www.tamtam.ai/l/public-sector-organisations-japan) (48)
- [Energy companies in Japan](https://www.tamtam.ai/l/energy-companies-japan) (45)
- [Retail chains in Japan](https://www.tamtam.ai/l/retail-chains-japan) (45)
- [Appliances, Electrical, and Electronics Manufacturing companies in Japan](https://www.tamtam.ai/l/appliances-electrical-and-electronics-manufacturing-companies-japan) (40)

## The same list elsewhere in Japan

- [Companies with in-house R&D in Tokyo](https://www.tamtam.ai/l/r-and-d-companies-tokyo) (54)

## The same list elsewhere

- [Companies with in-house R&D in the world](https://www.tamtam.ai/l/r-and-d-companies-in-the-world) (34,346)
- [Companies with in-house R&D in Asia](https://www.tamtam.ai/l/r-and-d-companies-in-asia) (4,166)

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Source: https://www.tamtam.ai/l/r-and-d-companies-japan