| # | Company | Employees |
|---|---|---|
| 1 |
SUMITOMO ELECTRIC INTERCON'T PROD (M) SBsumitomoelectric.com
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 |
289,000 |
| 2 |
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 |
| 3 |
Panasonicholdings.panasonic
A company committed to enhancing well-being and society through sustainable solutions, offering superior products and services to help people live their best |
30,689 |
| 4 |
Mitsubishi Heavy Industriesmhi.com
Delivers innovative integrated solutions across power, energy, machinery, infrastructure, aerospace, and defense, advancing lives and environmental sustainability globally. |
15,162 |
| 5 | 13,086 | |
| 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 |
Sumitomo Corporationsumitomocorp.com
Global network engaged in diverse business activities with focus on integrated strength, creating value for stakeholders and society for sustainable growth |
6,379 |
| 8 | 6,334 | |
| 9 |
Mitsui & Co., Ltd.mitsui.com
Global trading and investment company operating across diverse industries, focusing on resources, infrastructure, low-carbon energy, and healthcare solutions. |
5,765 |
| 10 | 4,235 | |
| 11 |
Chiyoda Corporationchiyodacorp.com
Global engineering company focused on energy and environment, aiming to be top-tier provider through innovative solutions and sustainable growth strategies |
3,984 |
| 12 |
Toyo Engineering Corporationtoyo-eng.com
Engineering globally to construct plants, focusing on quality, safety, environment, and cost Creating sustainable solutions for energy infrastructure with innovation |
3,002 |
| 13 |
China Resources (Holdings) Cocrc.com.hk
A group of companies with diverse businesses in Hong Kong and mainland China, originally founded in 1938 as Liow & Company |
2,575 |
| 14 |
Mitsui O.S.K. Lines, Ltd.mol.co.jp
A company with over 140 years of experience in international ocean shipping, generating added value and contributing to global industries |
2,163 |
| 15 |
Yanmaryanmar.com
A global innovator in industrial equipment, offering solutions from engines and agricultural machinery to marine systems and machine tools |
2,132 |
| 16 |
Toshiba Corporationglobal.toshiba
A global technology company specializing in energy, social infrastructure, electronic devices, and digital solutions, committed to creating a sustainable future |
2,021 |
| 17 |
ITOCHU Corporationitochu.co.jp
Engages in domestic and international trading of textiles, machinery, metals, energy, chemicals, food, ICT, finance, and real estate. |
1,987 |
| 18 |
AESCaesc-group.com
A global leader in high-performance battery development and manufacturing for electric vehicles and energy storage systems, driving the transition to clean energy solutions |
1,862 |
| 19 |
Fuji Electric Co., Ltd.fujielectric.com
The company is dedicated to integrating power semiconductor and electronics technologies with IoT to create sustainable solutions for industrial and social infrastructure sectors |
1,598 |
| 20 |
Mitsubishi Powerpower.mhi.com
Leading power solutions provider driving decarbonization through gas turbines, solid-oxide fuel cells, air quality control systems, and AI-enabled digital power plant solutions |
1,592 |
| 21 |
Kawasaki Heavy Industries, Ltd.global.kawasaki.com
A global technology corporation with diverse products in aerospace, rolling stock, ships, energy solutions, robotics, and leisure products |
1,459 |
| 22 |
Mitsubishi Electric in Indiain.mitsubishielectric.com
A global leader in electrical and electronic equipment manufacturing for various industries, focused on enriching society with innovative technology solutions |
1,294 |
| 23 |
Sumitomo Corporationsumitomocorp.co.jp
Global company with diverse business activities including sales, import/export, trade, and investments, leveraging Integrated Corporate Strength and trust from clients |
1,262 |
| 24 |
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 |
| 25 |
ENEOS Grouphd.eneos.co.jp
Leading energy and materials group in Asia, focusing on low carbon solutions and advanced product development in collaboration with top Japanese automotive manufacturers |
1,155 |
| 26 |
INPEX Corporationinpex.com
Global energy supply company involved in licensing, exploration, production, and sale of oil, gas, and mineral resources, as well as related investments and lending |
868 |
| 27 |
JERA Co., Inc.jera.co.jp
Located on the 25th floor of Nihonbashi Takashimaya Mitsui Building in Tokyo, the company offers services or products in that location |
833 |
| 28 |
JFE Engineering Corpjfe-eng.co.jp
An engineering company focused on meeting future needs, aiming to become a global leader by delivering essential products and services for societies and industries |
720 |
| 29 |
"K" line (Kawasaki Kisen Kaisha, Ltd)kline.co.jp
A leading Japanese transportation provider with a diverse fleet of cargo ships, including bulk carriers, container ships, LNG carriers, ro-ro ships, and tankers |
640 |
| 30 |
FURUKAWA ELECTRIC GROUPfurukawa.co.jp
A global leader in developing advanced materials and technologies for telecommunications, energy, automotive, and electronics industries to enable a sustainable society |
633 |
| 31 |
Tokyo Gas Co. Ltdtokyo-gas.co.jp
The largest gas utility company in Japan, serving over 11 million customers with city gas, LNG sales, electric power, and home services |
177 |
| 32 |
GS Yuasags-yuasa.com
A leading manufacturer of automotive batteries, industrial batteries, power supply systems, and electrical equipment, focused on innovation, growth, and customer satisfaction |
152 |
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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 Oct 24, 2026.
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