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This profile reflects asialaw research. The “(asialaw)” label indicates the source of this content.

Quick facts
# Patners

130+

# Other qualified practitioners

250+

# Practitioners (worldwide)

270+

Languages

Japanese, English, German, Vietnamese, Chinese, Korean, Russian, French, Spanish, Hindi, Marathi, Sinhala, and others

Key practice areas
Corporate and M&A (asialaw)
Restructuring and insolvency (asialaw)
Labour and employment (asialaw)
Private equity (asialaw)
Tax (asialaw)
Dispute resolution (asialaw)
Infrastructure (asialaw)
TMT (asialaw)
Competition/antitrust (asialaw)
Investment funds (asialaw)
Capital markets (asialaw)
Banking and finance (asialaw)
Construction (asialaw)
Regulatory (asialaw)
Industry Sector: Technology and telecommunications (asialaw)
Industry Sector: Pharmaceuticals and life sciences (asialaw)
Firm overview

Atsumi & Sakai is a multi-award-winning, independent full-service Tokyo law firm and the first Japanese law firm to create a foreign law joint venture, enabling it to admit foreign lawyers as partners and provide clients with the quality of service demanded by the modern international business community. Expanding from its highly regarded finance practice, the firm now acts for a wide range of international and domestic companies, banks, financial institutions and other businesses, offering a comprehensive range of legal expertise.

Atsumi & Sakai has an outward-looking approach to its international practice and includes foreign partners with extensive experience from leading international law firms. In addition to lawyers admitted in Japan, the firm includes foreign lawyers registered in Japan to advise on the laws of New York, California, China, Korea, Taiwan, India, Sri Lanka, England and Wales, and the Australian states of Queensland, New South Wales and Victoria.

In addition to its Tokyo head office, Osaka affiliate office and Fukuoka affiliate office in Japan, the firm has offices in London, Brussels and Ho Chi Minh City, as well as affiliated offices in New York and Frankfurt.

Key practice areas

  • Banking and finance
  • Capital markets
  • Competition/antitrust
  • Construction
  • Corporate and M&A
  • Dispute resolution
  • General business law
  • Intellectual property
  • Investment funds
  • Labour and employment
  • Private client
  • Private equity
  • Regulatory
  • Restructuring and insolvency
  • Tax
  • For more information click here
Sector expertise

  • Accounting
  • Agriculture
  • Aviation
  • Automotive
  • Banking
  • Construction and materials
  • Consumer goods and services
  • Energy
  • Financial services
  • Fisheries and aquaculture
  • Food and beverage
  • Forestry
  • Gaming
  • Government and public policy
  • Healthcare
  • Industrials
  • Insurance
  • Investment management
  • Media
  • Mining
  • Natural resources
  • Oil and gas
  • Pharmaceutical and life sciences
  • Real estate
  • Shipping
  • Social infrastructure
  • Technology and telecommunications
  • Tourism
  • Transport
  • Utilities
  • Other
  • For more information click here
Address:
Fukoku Seimei Bldg., 2-2-2 Uchisaiwaicho
Chiyoda-ku, Tokyo
100-0011
Japan
Tel:+81 3 5501 2111 Fax:+81 3 5501 2211 Email:Contact Us Web Address:https://www.aplawjapan.com/en
2025 Edition
Banking and finance (asialaw)
8 firms ranked
View full list

Outstanding

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Mori Hamada (asialaw)
18 practice areas
View full profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile

Highly recommended

Atsumi & Sakai
16 practice areas
View full profile
TMI Associates (asialaw)
11 practice areas
View profile

Recommended

City-Yuwa Partners (asialaw)
13 practice areas
View profile

Notable

Tsubame Law Offices (asialaw)
1 practice area
View profile
Capital markets (asialaw)
8 firms ranked
View full list

Outstanding

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Mori Hamada (asialaw)
18 practice areas
View full profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile

Highly recommended

Atsumi & Sakai
16 practice areas
View full profile
TMI Associates (asialaw)
11 practice areas
View profile

Recommended

City-Yuwa Partners (asialaw)
13 practice areas
View profile
Competition/antitrust (asialaw)
12 firms ranked
View full list

Outstanding

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Mori Hamada (asialaw)
18 practice areas
View full profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile

Highly recommended

Miura & Partners (asialaw)
6 practice areas
View full profile
TMI Associates (asialaw)
11 practice areas
View profile

Recommended

Atsumi & Sakai
16 practice areas
View full profile
City-Yuwa Partners (asialaw)
13 practice areas
View profile
Oh-Ebashi LPC & Partners (asialaw)
6 practice areas
View profile

Notable

Kobayashi & Todo (asialaw)
1 practice area
View profile
Yabuki Law Offices (asialaw)
2 practice areas
View profile
Construction (asialaw)
5 firms ranked
View full list

Outstanding

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Atsumi & Sakai
16 practice areas
View full profile
Mori Hamada (asialaw)
18 practice areas
View full profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile
Corporate and M&A (asialaw)
14 firms ranked
View full list

Outstanding

Mori Hamada (asialaw)
18 practice areas
View full profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile

Highly recommended

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Miura & Partners (asialaw)
6 practice areas
View full profile
Oh-Ebashi LPC & Partners (asialaw)
6 practice areas
View profile
TMI Associates (asialaw)
11 practice areas
View profile

Recommended

Atsumi & Sakai
16 practice areas
View full profile
City-Yuwa Partners (asialaw)
13 practice areas
View profile
Hibiya-Nakata (asialaw)
1 practice area
View profile
Tokyo International Law Office (asialaw)
4 practice areas
View profile

Notable

Kitahama Partners (asialaw)
1 practice area
View profile
Masuda & Partners Law Office (asialaw)
3 practice areas
View profile
southgate (asialaw) View profile
Dispute resolution (asialaw)
17 firms ranked
View full list

Outstanding

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Mori Hamada (asialaw)
18 practice areas
View full profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile

Highly recommended

Abe Ikubo & Katayama (asialaw)
2 practice areas
View profile
Atsumi & Sakai
16 practice areas
View full profile
Momo-o Matsuo & Namba (asialaw)
1 practice area
View profile
Oh-Ebashi LPC & Partners (asialaw)
6 practice areas
View profile
TMI Associates (asialaw)
11 practice areas
View profile

Recommended

City-Yuwa Partners (asialaw)
13 practice areas
View profile
Freeman & Partners (asialaw)
1 practice area
View profile
Gaien Partner (asialaw)
1 practice area
View profile
Tokyo International Law Office (asialaw)
4 practice areas
View profile

Notable

Masuda & Partners Law Office (asialaw)
3 practice areas
View profile
Matsuo & Kosugi (asialaw)
2 practice areas
View profile
Miura & Partners (asialaw)
6 practice areas
View full profile
Industry Sector: Aviation and shipping (asialaw)
8 firms ranked
View full list

Highly recommended

Recommended

Atsumi & Sakai
16 practice areas
View full profile
TMI Associates (asialaw)
11 practice areas
View profile

Notable

City-Yuwa Partners (asialaw)
13 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile
Industry Sector: Banking and financial services (asialaw)
5 firms ranked
View full list

Outstanding

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Mori Hamada (asialaw)
18 practice areas
View full profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile

Highly recommended

Atsumi & Sakai
16 practice areas
View full profile
Industry Sector: Energy (asialaw)
8 firms ranked
View full list

Outstanding

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Atsumi & Sakai
16 practice areas
View full profile
Mori Hamada (asialaw)
18 practice areas
View full profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile

Highly recommended

Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
TMI Associates (asialaw)
11 practice areas
View profile

Recommended

City-Yuwa Partners (asialaw)
13 practice areas
View profile
Tokyo International Law Office (asialaw)
4 practice areas
View profile
Industry Sector: Infrastructure (asialaw)
5 firms ranked
View full list

Outstanding

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Atsumi & Sakai
16 practice areas
View full profile

Highly recommended

Mori Hamada (asialaw)
18 practice areas
View full profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile
Industry Sector: Insurance (asialaw)
5 firms ranked
View full list

Outstanding

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile

Highly recommended

Mori Hamada (asialaw)
18 practice areas
View full profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile

Recommended

Atsumi & Sakai
16 practice areas
View full profile
Industry Sector: Media and entertainment (asialaw)
6 firms ranked
View full list

Highly recommended

Mori Hamada (asialaw)
18 practice areas
View full profile
TMI Associates (asialaw)
11 practice areas
View profile

Recommended

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile

Notable

Atsumi & Sakai
16 practice areas
View full profile
Industry Sector: Pharmaceuticals and life sciences (asialaw)
9 firms ranked
View full list

Outstanding

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile

Highly recommended

Nishimura & Asahi (asialaw)
15 practice areas
View profile
TMI Associates (asialaw)
11 practice areas
View profile

Recommended

Abe Ikubo & Katayama (asialaw)
2 practice areas
View profile
Mori Hamada (asialaw)
18 practice areas
View full profile

Notable

Atsumi & Sakai
16 practice areas
View full profile
Oh-Ebashi LPC & Partners (asialaw)
6 practice areas
View profile
Ohno & Partners (asialaw)
2 practice areas
View profile
Industry Sector: Real estate (asialaw)
8 firms ranked
View full list

Outstanding

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Mori Hamada (asialaw)
18 practice areas
View full profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile

Highly recommended

Atsumi & Sakai
16 practice areas
View full profile
TMI Associates (asialaw)
11 practice areas
View profile

Recommended

City-Yuwa Partners (asialaw)
13 practice areas
View profile
Ushijima & Partners (asialaw)
1 practice area
View profile
Industry Sector: Technology and telecommunications (asialaw)
6 firms ranked
View full list

Highly recommended

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile

Recommended

Atsumi & Sakai
16 practice areas
View full profile
Mori Hamada (asialaw)
18 practice areas
View full profile
TMI Associates (asialaw)
11 practice areas
View profile
Intellectual property (asialaw)
14 firms ranked
View full list

Outstanding

Abe Ikubo & Katayama (asialaw)
2 practice areas
View profile
Nakamura & Partners (asialaw)
1 practice area
View full profile
TMI Associates (asialaw)
11 practice areas
View profile

Highly recommended

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Mori Hamada (asialaw)
18 practice areas
View full profile

Recommended

Kubota (asialaw) View profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile
Ohno & Partners (asialaw)
2 practice areas
View profile

Notable

Atsumi & Sakai
16 practice areas
View full profile
Shiomizaka (asialaw)
2 practice areas
View profile
Sueyoshi & Sato (asialaw)
1 practice area
View profile
ZeLo (asialaw)
6 practice areas
View profile
Investment funds (asialaw)
8 firms ranked
View full list

Outstanding

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Mori Hamada (asialaw)
18 practice areas
View full profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile

Highly recommended

Atsumi & Sakai
16 practice areas
View full profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile
TMI Associates (asialaw)
11 practice areas
View profile

Notable

City-Yuwa Partners (asialaw)
13 practice areas
View profile
Oh-Ebashi LPC & Partners (asialaw)
6 practice areas
View profile
Labour and employment (asialaw)
11 firms ranked
View full list

Outstanding

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Mori Hamada (asialaw)
18 practice areas
View full profile

Highly recommended

Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile
TMI Associates (asialaw)
11 practice areas
View profile

Recommended

Atsumi & Sakai
16 practice areas
View full profile

Notable

City-Yuwa Partners (asialaw)
13 practice areas
View profile
Miura & Partners (asialaw)
6 practice areas
View full profile
Oh-Ebashi LPC & Partners (asialaw)
6 practice areas
View profile
Private equity (asialaw)
7 firms ranked
View full list

Highly recommended

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Mori Hamada (asialaw)
18 practice areas
View full profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile

Recommended

Atsumi & Sakai
16 practice areas
View full profile
TMI Associates (asialaw)
11 practice areas
View profile

Notable

Oh-Ebashi LPC & Partners (asialaw)
6 practice areas
View profile
Regulatory (asialaw)
6 firms ranked
View full list

Outstanding

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Mori Hamada (asialaw)
18 practice areas
View full profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile

Highly recommended

Atsumi & Sakai
16 practice areas
View full profile
TMI Associates (asialaw)
11 practice areas
View profile
Restructuring and insolvency (asialaw)
10 firms ranked
View full list

Outstanding

Anderson Mori & Tomotsune (asialaw)
14 practice areas
View profile
Mori Hamada (asialaw)
18 practice areas
View full profile
Nagashima Ohno & Tsunematsu (asialaw)
14 practice areas
View profile
Nishimura & Asahi (asialaw)
15 practice areas
View profile

Highly recommended

Abe Ikubo & Katayama (asialaw)
2 practice areas
View profile

Recommended

Atsumi & Sakai
16 practice areas
View full profile
Oh-Ebashi LPC & Partners (asialaw)
6 practice areas
View profile
TMI Associates (asialaw)
11 practice areas
View profile

Notable

Momo-o Matsuo & Namba (asialaw)
1 practice area
View profile
Shiomizaka (asialaw)
2 practice areas
View profile
Overview

Atsumi & Sakai is a leading full-service law firm offering a range of counsel services pertaining to most financial and corporate law matters. The firm has an excellent reputation for assisting startups and financial institutions on fintech-related matters. It offers additional strength in the energy, infrastructure and real-estate sectors. The firm is also known for its expertise in securitisation, covered bonds and similar structured finance transactions. Go Fujimoto and Yusuke Miura are key contacts. The firm strengthened its partnership with two significant lateral hires in 2024. Akiko Hosokawa joined from Baker McKenzie in June, bringing extensive experience in banking, financial regulation and trust law. The firm further expanded in October with the addition from Nagashima Ohno & Tsunematsu of Makiko Harada, who focuses on banking, project finance and data-protection matters. 

Linked Reviews
Construction (asialaw)

Work highlights

Advising Mitsubishi Research Institute, Aichi Prefecture and Nagoya City on a major PPP project for the 2026 Asian Games in Aichi-Nagoya. The development encompasses the athletes' village and its post-Games transformation into a comprehensive urban development featuring residential areas, university facilities, sports venues, retail spaces and healthcare facilities. The firm is providing full legal support including project structuring, tender documentation and process management. 

Key clients 

Mitsubishi HC Capital 

Dispute resolution (asialaw)

Work highlights 

Successfully represented multiple international institutional investors in a ¥9 billion ($61 million) damages claim against Toshiba Corporation over mis-statements in annual reports. The complex multi-jurisdictional matter, concluded in March 2024, involved laws from seven jurisdictions and required coordination among foreign asset managers, global custodians and investment funds. The case marks one of Japan's largest securities litigation matters involving institutional investors. 

Infrastructure (asialaw)

Work highlights 

Advising Mitsubishi Research Institute and Nagoya City on a PFI project for the development and operation of an international MICE (meetings, incentives, conferences and exhibitions) facility. The project involves both rehabilitate-operate and build-transfer-operate structures for the design, construction and operation of the venue in Nagoya. 

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Deal Highlights
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