Atsumi & Sakai


Fukoku Seimei Bldg.
2-2-2, Uchisaiwaicho, Chiyoda-ku
Tokyo, 100-0011

+81 03 5501 2111

+81 03 5501 2211

Key contacts:

Managing Partner: Mr. Hiroo ATSUMI
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Quick facts:

Number of lawyers: Approx. 140
Languages: Japanese, English, German, Chinese, Korean, Russian, Hindi, Marathi

Atsumi & Sakai is a multi-award-winning, independent Tokyo law firm, and among the largest independent full-service law firms in Japan. The firm was the first domestic Japanese law firm to create a foreign law joint venture, which enables it to admit foreign partners and so offer its clients the quality of service that the modern international business community demands. 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.

"I’m very satisfied, its work is fast and professional and the cost is reasonable. It has helped us prepare purchase and lease agreements; it has helped us with regulatory matters and applications; and it has also supported our negotiations. They are lawyers of course, but they are commercially aware and have good experience that we benefit from."

Meet the team.

Asset Finance:

Banking & Finance:

Capital Markets (Debt):


Financial Regulations:


Project Finance:

Real Estate/Real Estate Finance:

Regional Revitalization:

Renewable Energy Finance:

Structured Finance & Securitisation:




Labour Law:

Life Science:



Projects & Energy:

Sports & Entertainment:

Tax & Accounting:

Litigation, Arbitration, Insolvency & Business Revitalization:


Inbound Practice:

International Trade:

China Practice:

Europe Practice:

India Practice:

Russia Practice:

Vietnam Practice:

Risk Management:

White Collar Crime:



  • Accounting
  • Agriculture
  • Automotive
  • Aviation
  • 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
  • Pharm and life sciences
  • Real estate
  • Shipping
  • Social infrastructure
  • Tech and telecoms
  • Tourism
  • Transport
  • Utilities

Atsumi & Sakai Europe Limited (London Office)
4th Floor, 50 Mark Lane
London EC3R 7QR

T: +44 0 203 696 6540 
M: +44 0 75 4899 7865

Atsumi Sakai Janssen Rechtsanwaltsgesellschaft mbH (Fankfurt Office)
Taunusanlage 21
60325 Frankfurt am Main

T: +49 0 69 7474 5050
F: +49 0 69 7474 5064