Atsumi & Sakai


Fukoku Seimei Bldg. (Reception: 16F)
2-2-2 Uchisaiwaicho, Chiyoda-ku

+81 3 5501 2111

+81 3 5501 2211

Quick facts:

Contact: Hiroo Atsumi, Bonnie L. Dixon
Number of lawyers: 160
Number of partners: 78
Languages: Japanese, English, German, Chinese, Hindi, Marathi, Russian, Vietnamese

The firm

Atsumi & Sakai is a multi-award-winning, independent Tokyo law firm, and one of the ten largest independent full-service law firms in Japan. The firm was the first 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.

International practice

Atsumi & Sakai has an outward-looking approach to its international practice, and has several foreign partners and consultants with extensive experience from leading international law firms, so providing its clients with the benefit of both Japanese law expertise and real international experience. As the only independent Japanese law firm with a London office, it can also provide real-time advice on Japanese law to its clients in Europe, the Middle East and Africa, and a more convenient service to clients in the Americas. Our international work, both inward investment and working with our Japanese clients on offshore matters, has expanded very significantly in recent years.

As a ’foreign law joint enterprise,’ in addition to lawyers admitted in Japan (including Japanese lawyers also admitted in England and Wales and the Republic of the Marshall Islands), the firm includes foreign lawyers registered in Japan to advise on the laws of the US States of New York and California, the People’s Republic of China, Taiwan, India, the State of Queensland, Australia, US and Australian Federal laws, and the laws of the Federal Republic of Germany (in collaboration with Janssen Foreign Law Office).

As a member of global legal networks, and having had many years’ experience in working with international law firms, the firm is able to assist clients in the selection of overseas counsel and to work on cross-border transactions with foreign lawyers it is familiar with.

Innovation & diversity

The firm constantly seeks to anticipate its clients’ needs for new legal services, most recently those arising from the rapid technological developments in the financial services industry, and strives to provide high-quality and cost-effective services and solutions to support start-up companies. We also offer flexible alternative fee arrangements tailored to meet the specific needs and goals of each client company.

We take a proactive approach to diversity, with nearly 30% of our lawyers being women and 10% foreigners, and encourage our lawyers to maintain a good work/life balance, which has seen the firm recognised as Japan’s leading law firm for employee satisfaction.

  • Banking and finance
  • Structured finance
  • Asset finance
  • Regulation
  • Capital markets
  • Antitrust, competition
  • M&A
  • Joint ventures
  • Private equity
  • Energy
  • Investment funds
  • Real estate
  • Construction
  • Dispute resolution
  • Litigation
  • Arbitration
  • Restructuring
  • Insolvency
  • Risk management, compliance, corporate governance
  • Criminal defense
  • General corporate
  • IP, IT
  • Tax
  • Insurance
  • Employment
  • TMT
  • Sports
  • Entertainment
  • Life sciences
  • Agriculture, forestry, fisheries