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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Komatsukomatsu.jp
Innovating manufacturing and technology to create value for a sustainable future where people, businesses, and the planet flourish together |
60,000 | |||
| 2 |
dentsudentsu.com
Helping brands predict future opportunities and create growth paths by connecting brand, content, commerce, and experience with creativity. |
19,298 | |||
| 3 |
Mizuhomizuhogroup.com
This company offers a unique and inclusive culture, providing opportunities for career growth and global impact in the financial industry |
15,086 | |||
| 4 |
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 | |||
| 5 |
Yokogawayokogawa.com
Provides measurement, control, information solutions across diverse industries; optimizes production, assets, supply chains with digital technologies; enables autonomous operations. |
8,675 | |||
| 6 |
Mitsubishi Corporationmitsubishicorp.com
Integrated trading and investment company operating across multiple industries including energy, materials, infrastructure, mobility, food, and sustainable solutions worldwide. |
7,347 | |||
| 7 | 5,213 | ||||
| 8 | 4,786 | ||||
| 9 |
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 | |||
| 10 |
KDDI Corporationkddi.com
Global telecommunications provider offering data centers, networks, mobile services, and submarine cable infrastructure across multiple international locations. |
2,510 | |||
| 11 |
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 | |||
| 12 | 1,495 | ||||
| 13 |
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 | |||
| 14 |
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 | |||
| 15 | 1,105 | ||||
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 |
Internet Initiative Japan (IIJ)iij.ad.jp
A pioneering provider of internet technology services, offering cloud computing, WAN services, systems integration, and more for creating innovative network solutions |
1,088 | |||
| 17 | 740 | ||||
| 18 |
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 | |||
| 19 |
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 | |||
| 20 |
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 | |||
| 21 |
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 | |||
| 22 |
artience group (former Toyo Ink Group)artiencegroup.com
A Japan-based innovator providing diverse fine chemical products globally, using core technologies in coatings, dispersions, polymers, and color materials |
460 | |||
| 23 |
Kirin Holdings Co., Ltdkirinholdings.com
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 |
456 | |||
| 24 |
CMIC Groupen.cmicgroup.com
A pioneering provider of CRO services in Japan with a full pharmaceutical value-chain offering, including manufacturing, sales, marketing, and healthcare services |
412 | |||
| 25 |
KOKI Groupkoki-holdings.com
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 |
403 | |||
| 26 |
Tamura Corporationtamuracorp.com
Manufacture and supply of electronic components, chemical mounting, and information equipment supporting industries, energy, and social infrastructure sectors. |
384 | |||
| 27 |
Azbil Corporationazbil.com
A global leader in building and industrial automation, providing high value-added solutions for efficiency, sustainability, safety, and comfort in various industries |
355 | |||
| 28 |
KOKUYOkokuyo.com
A global provider of premium office furniture and stationery known for exceptional quality, innovative workspace solutions, and strong commitment to sustainability |
354 | |||
| 29 |
Lion Corporation Japanlion.co.jp
A leading Japanese company established in 1891, producing and marketing a wide range of consumer products and high-performance chemicals for various industries |
278 | |||
| 30 |
Sony | Technologysony.com
Innovating emotions and social value to support a variety of businesses in electronics, entertainment, and finance under the Sony Group |
278 | |||
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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
- Companies with in-house R&D in Tokyo 54
- Publicly traded companies in Tokyo 43
- Manufacturers in Tokyo 39
- Hardware manufacturers in Tokyo 26