These companies are large, established firms with in-house R&D, predominantly headquartered in Tokyo. A significant number operate in IT services and consulting, alongside manufacturing and retail. For instance, NTT DATA is a global IT services provider, Komatsu innovates in machinery manufacturing, and Takeda focuses on pharmaceutical manufacturing.
The data reveals a concentration of large corporations founded between the late 19th and mid-20th centuries. Hitachi, founded in 1910, specializes in IT services, while Kao EMEA & Americas is a leading manufacturer of hygiene and beauty products. Sony creates technology and entertainment, and UNIQLO is a major retail holding company.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
NTT DATA, Inc.global.ntt
A global IT services provider offering a wide range of business and technology solutions as it transitions to NTT DATA |
140,000 | |||
| 2 |
Komatsukomatsu.jp
Innovating manufacturing and technology to create value for a sustainable future where people, businesses, and the planet flourish together |
60,000 | |||
| 3 |
NTT DATAnttdata.com
Providing IT and business consulting, digital transformation, managed services, and industry solutions to clients worldwide for long-term success. |
48,385 | |||
| 4 |
Hitachihitachi.com
A technology and innovation company committed to creating a more sustainable society through advanced social infrastructure systems and improving quality of life |
40,513 | |||
| 5 |
Takedatakeda.com
The company is committed to transforming lives by advancing science, focusing on patient needs, and setting new standards in healthcare |
37,267 | |||
| 6 |
Kao EMEA & Americaskao.com
Leading manufacturer of hygiene, beauty, and health products with premium brands in consumer care, salon, cosmetics, and luxury skincare sectors. |
34,000 | |||
| 7 | 24,935 | ||||
| 8 |
UNIQLOfastretailing.com
A leading Japanese retail holding company offering high-quality, innovative apparel under the concept of LifeWear in over 25 markets worldwide |
19,984 | |||
| 9 |
NEC Corporationnec.com
An industry leader in IT and network integration, focusing on sustainable solutions for safety, security, and efficiency in a rapidly changing world |
17,980 | |||
| 10 |
Asahi Kaseiasahi-kasei.com
Global company providing healthcare products, residential solutions, and advanced materials to improve life quality and support sustainable development worldwide. |
10,369 | |||
| 11 |
Yokogawayokogawa.com
Provides measurement, control, information solutions across diverse industries; optimizes production, assets, supply chains with digital technologies; enables autonomous operations. |
8,675 | |||
| 12 |
TrendAItrendmicro.com
Global cybersecurity company providing AI-powered protection and risk management for enterprises, governments, and consumers across diverse digital environments. |
8,060 | |||
| 13 | 4,786 | ||||
| 14 |
Advantestadvantest.com
Leading manufacturer of automatic test and measurement equipment for semiconductor design and production, serving applications such as 5G, IoT, AI, and more globally |
3,901 | |||
| 15 |
Rakuten Symphonyrakuten.com
Global B2B services provider in mobile telco industry, offering cloud-based international mobile services and innovative telco platform, with operations in 30 countries |
3,102 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
Fast Retailingfastretailing.com
Global apparel retail company operating multiple brands, designing and selling innovative clothing with a focus on quality, simplicity, and longevity. |
3,062 | |||
| 17 |
Panasonic Connectconnect.panasonic.com
A company dedicated to providing innovative B2B solutions, driving sustainability and societal advancement by connecting with customers to solve challenges and create value |
2,476 | |||
| 18 | 2,380 | ||||
| 19 |
Daiichi Sankyo Japandaiichisankyo.com
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 |
1,811 | |||
| 20 |
Penta-Ocean Construction Company Limitedpenta-ocean.co.jp
A Japanese construction firm specializing in marine works and land reclamation, with offices in multiple countries and involvement in various major projects globally |
1,503 | |||
| 21 |
DNP Dai Nippon Printing Co., Ltd.global.dnp
Established in 1876, this company specializes in printing technology for various sectors such as packaging, decorative materials, electronic components, and information media supplies |
1,242 | |||
| 22 |
IHI Corporationihi.co.jp
A Japanese company with a history dating back to 1853, specializing in shipbuilding, aircraft engines, industrial machinery, bridges, and power station boilers |
1,239 | |||
| 23 |
PENTAX Medicalpentaxmedical.com
Global provider of endoscopic products and services focused on improving patient care through quality, innovation, and simplicity in healthcare delivery |
1,066 | |||
| 24 |
KIOXIA Groupkioxia-holdings.com
A global leader in memory solutions, specializing in flash memory and SSDs, driving innovation with cutting-edge technology for various high-density applications |
729 | |||
| 25 |
Taisei Corporation 大成建設株式会社taisei.co.jp
A leading Japanese general construction contractor with expertise in building construction, civil engineering, and real estate development Operating internationally with multiple overseas offices |
675 | |||
| 26 |
Shinryo Corporationshinryo.com
Shinryo Corporation is a company that specializes in providing technology solutions and services Make sure to visit their official website for accurate information |
646 | |||
| 27 |
STANLEY ELECTRIC CO., LTD.stanley-electric.com
A leading electrical manufacturer specializing in automotive lighting, optoelectronics, and UV products, with a focus on maximizing the value of light |
624 | |||
| 28 | 525 | ||||
| 29 |
Nippon Steel Engineering Co., Ltd.eng.nipponsteel.com
Designing, constructing, and operating various plants and machinery internationally, specializing in steel, environmental, energy, marine engineering, and building construction solutions |
519 | |||
| 30 |
SmartNewscareers.smartnews.com
A global leader in news discovery, using machine-learning technology and editorial expertise to deliver accurate, timely information from 3,000+ publishing partners worldwide |
498 | |||
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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 Tokyo
- The largest companies in Tokyo 162
- Multinational companies in Tokyo 99
- Publicly traded companies in Tokyo 43
- Manufacturers in Tokyo 39
- Corporate groups and holding companies in Tokyo 32
- Hardware manufacturers in Tokyo 26