# The 30 largest corporate groups and holding companies in Tokyo

Tamtam tracks 32 corporate groups and holding companies headquartered in Tokyo. This list ranks the 30 largest by number of employees on LinkedIn, led by Komatsu, dentsu and Mizuho. Their median headcount is 1,105. Half of them were founded in 1922 or later.

This selection of corporate groups and holding companies in Tokyo includes prominent firms in manufacturing, financial services, and advertising. Companies like Komatsu (machinery manufacturing), Mizuho (financial services), and dentsu (advertising services) are represented, alongside Asahi Kasei (chemical manufacturing) and Mitsubishi Corporation (international trade). These are established organizations with substantial workforces.

The data shows a strong presence of companies founded in the late 19th and early 20th centuries, such as DNP Dai Nippon Printing Co., Ltd. (1876), Komatsu (1921), and Asahi Kasei (1922). This suggests a historical foundation of industrial and service sector development within Tokyo's corporate landscape.

🇯🇵 Tokyo · 30 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [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 |
| 2 | [dentsu](https://www.tamtam.ai/c/dentsu) (dentsu.com)<br>Helping brands predict future opportunities and create growth paths by connecting brand, content, commerce, and experience with creativity. | Advertising Services | 🇯🇵 Tokyo | 19,298 |  |
| 3 | [Mizuho](https://www.tamtam.ai/c/mizuho) (mizuhogroup.com)<br>This company offers a unique and inclusive culture, providing opportunities for career growth and global impact in the financial industry | Financial Services | 🇯🇵 Tokyo | 15,086 |  |
| 4 | [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 |
| 5 | [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 |  |
| 6 | [Mitsubishi Corporation](https://www.tamtam.ai/c/mitsubishi-corporation) (mitsubishicorp.com)<br>Integrated trading and investment company operating across multiple industries including energy, materials, infrastructure, mobility, food, and sustainable solutions worldwide. | International Trade and Development | 🇯🇵 Tokyo | 7,347 |  |
| 7 | [NYK Line](https://www.tamtam.ai/c/nyk-line) (nyk.com)<br>An international company specializing in logistics services, offering comprehensive supply chain solutions to help businesses efficiently transport goods worldwide | Maritime Transportation | 🇯🇵 Tokyo | 5,213 |  |
| 8 | [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 |  |
| 9 | [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 |
| 10 | [KDDI Corporation](https://www.tamtam.ai/c/kddi-corporation) (kddi.com)<br>Global telecommunications provider offering data centers, networks, mobile services, and submarine cable infrastructure across multiple international locations. | Telecommunications | 🇯🇵 Tokyo | 2,510 | 1984 |
| 11 | [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 |
| 12 | [ADK](https://www.tamtam.ai/c/adk) (adk.jp)<br>A leading advertising company in Japan transformed into a diversified group focusing on consumer activation, marketing solutions, creative services, and IP business | Advertising Services | 🇯🇵 Tokyo | 1,495 | 1956 |
| 13 | [DNP Dai Nippon Printing Co., Ltd.](https://www.tamtam.ai/c/dnp-dai-nippon-printing-co-ltd) (global.dnp)<br>Established in 1876, this company specializes in printing technology for various sectors such as packaging, decorative materials, electronic components, and information media supplies | Printing Services | 🇯🇵 Tokyo | 1,242 | 1876 |
| 14 | [IHI Corporation](https://www.tamtam.ai/c/ihi-corporation) (ihi.co.jp)<br>A Japanese company with a history dating back to 1853, specializing in shipbuilding, aircraft engines, industrial machinery, bridges, and power station boilers | Machinery Manufacturing | 🇯🇵 Tokyo | 1,239 | 1853 |
| 15 | [TIS Inc.](https://www.tamtam.ai/c/tis-inc) (tis.com)<br>Specializing in system life cycle support and total outsourcing solutions to enhance efficiency in IT operations and business environments for customers | Software Development | 🇯🇵 Tokyo | 1,105 | 1971 |
| 16 | [Internet Initiative Japan (IIJ)](https://www.tamtam.ai/c/internet-initiative-japan-iij) (iij.ad.jp)<br>A pioneering provider of internet technology services, offering cloud computing, WAN services, systems integration, and more for creating innovative network solutions | IT Services and IT Consulting | 🇯🇵 Tokyo | 1,088 | 1992 |
| 17 | [CCC Ltd.](https://www.tamtam.ai/c/ccc-ltd) (ccc.co.jp)<br>A company specializing in entertainment content, multimedia distribution, and marketing consulting They aim to be a top idea company and cultural infrastructure builder | Advertising Services | 🇯🇵 Tokyo | 740 |  |
| 18 | [KIOXIA Group](https://www.tamtam.ai/c/kioxia-group) (kioxia-holdings.com)<br>A global leader in memory solutions, specializing in flash memory and SSDs, driving innovation with cutting-edge technology for various high-density applications | Semiconductor Manufacturing | 🇯🇵 Tokyo | 729 | 2017 |
| 19 | [Taisei Corporation 大成建設株式会社](https://www.tamtam.ai/c/taisei-corporation) (taisei.co.jp)<br>A leading Japanese general construction contractor with expertise in building construction, civil engineering, and real estate development Operating internationally with multiple overseas offices | Construction | 🇯🇵 Tokyo | 675 | 1873 |
| 20 | [STANLEY ELECTRIC CO., LTD.](https://www.tamtam.ai/c/stanley-electric-co-ltd) (stanley-electric.com)<br>A leading electrical manufacturer specializing in automotive lighting, optoelectronics, and UV products, with a focus on maximizing the value of light | Appliances, Electrical, and Electronics Manufacturing | 🇯🇵 Tokyo | 624 | 1920 |
| 21 | [SmartNews](https://www.tamtam.ai/c/smartnews) (careers.smartnews.com)<br>A global leader in news discovery, using machine-learning technology and editorial expertise to deliver accurate, timely information from 3,000+ publishing partners worldwide | Technology, Information and Media | 🇯🇵 Tokyo | 498 | 2012 |
| 22 | [artience group (former Toyo Ink Group)](https://www.tamtam.ai/c/artience-group-former-toyo-ink-group) (artiencegroup.com)<br>A Japan-based innovator providing diverse fine chemical products globally, using core technologies in coatings, dispersions, polymers, and color materials | Chemical Manufacturing | 🇯🇵 Tokyo | 460 | 1896 |
| 23 | [Kirin Holdings Co., Ltd](https://www.tamtam.ai/c/kirin-holdings-co-ltd) (kirinholdings.com)<br>Established in 1907, we have grown for over 100 years, expanding into beverages, food, pharmaceuticals, and health science fields to enhance quality of life and address social issues | Food and Beverage Services | 🇯🇵 Tokyo | 456 | 1907 |
| 24 | [CMIC Group](https://www.tamtam.ai/c/cmic-group) (en.cmicgroup.com)<br>A pioneering provider of CRO services in Japan with a full pharmaceutical value-chain offering, including manufacturing, sales, marketing, and healthcare services | Pharmaceutical Manufacturing | 🇯🇵 Tokyo | 412 | 1992 |
| 25 | [KOKI Group](https://www.tamtam.ai/c/koki-group) (koki-holdings.com)<br>A global leader in planning, manufacturing, and selling a wide range of professional and DIY electric tools with over 70% of sales coming from overseas | Manufacturing | 🇯🇵 Tokyo | 403 | 1918 |
| 26 | [Tamura Corporation](https://www.tamtam.ai/c/tamura-corporation) (tamuracorp.com)<br>Manufacture and supply of electronic components, chemical mounting, and information equipment supporting industries, energy, and social infrastructure sectors. | Appliances, Electrical, and Electronics Manufacturing | 🇯🇵 Tokyo | 384 | 1924 |
| 27 | [Azbil Corporation](https://www.tamtam.ai/c/azbil-corporation) (azbil.com)<br>A global leader in building and industrial automation, providing high value-added solutions for efficiency, sustainability, safety, and comfort in various industries | Automation Machinery Manufacturing | 🇯🇵 Tokyo | 355 | 1906 |
| 28 | [KOKUYO](https://www.tamtam.ai/c/kokuyo) (kokuyo.com)<br>A global provider of premium office furniture and stationery known for exceptional quality, innovative workspace solutions, and strong commitment to sustainability | Furniture and Home Furnishings Manufacturing | 🇯🇵 Tokyo | 354 | 1905 |
| 29 | [Lion Corporation Japan](https://www.tamtam.ai/c/lion-corporation-japan) (lion.co.jp)<br>A leading Japanese company established in 1891, producing and marketing a wide range of consumer products and high-performance chemicals for various industries | Consumer Goods | 🇯🇵 Tokyo | 278 | 1891 |
| 30 | [Sony \| Technology](https://www.tamtam.ai/c/sony-technology) (sony.com)<br>Innovating emotions and social value to support a variety of businesses in electronics, entertainment, and finance under the Sony Group | Entertainment Providers | 🇯🇵 Tokyo | 278 | 1946 |

## 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.

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## The same list elsewhere in Japan

- [Corporate groups and holding companies in Japan](https://www.tamtam.ai/l/holding-companies-japan) (181)

## The same list elsewhere

- [Corporate groups and holding companies in the world](https://www.tamtam.ai/l/holding-companies-in-the-world) (12,864)
- [Corporate groups and holding companies in Asia](https://www.tamtam.ai/l/holding-companies-in-asia) (2,718)

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Source: https://www.tamtam.ai/l/holding-companies-tokyo