2. About Us



About Our Firm

Okuno & Partners is a full-service independent business law firm that specializes in commercial dispute resolution – mediation, arbitration, and litigation; corporate and finance; and mergers and acquisitions. It also has a highly regarded restructuring and insolvency practice.

The firm, which was established in 1924, has been advising and representing international organizations, multinational corporations, financial institutions, small and medium-sized companies, and individuals from around the world for close to a century. During this time, it has built up an excellent reputation in both the domestic and international markets by delivering prompt, clear, and cost-effective solutions.

In the international sphere, we are well-known for our expertise in international commercial arbitration, corporate advisory services, and cross-border transactions. Our lawyers have a wealth of experience in representing foreign clients before domestic courts and authorities. As part of our commitment to quality, Okuno & Partners became a member of Alliance of Business Lawyers (ABL) to broaden and strengthen its global network. ABL is a global network of leading business law firms, giving our clients access to fast, accurate, and reliable advice from anywhere around the world.

Our membership of ABL ensures that we can offer added value to our clients by referring them to reputable foreign business law firms that provide a comparable level of service. All member firms are broad-based corporate law practices with litigation capabilities. Like us, our partners have English-speaking lawyers and embrace and use the latest technologies.

Our International Desk is headed by Ms. Masako BANNO and Mr. Michael MROCZEK who between them have decades of experience in cross-border business.

For a list of member firms and international legal updates please visit


ADDRESS Kyobashi TD Bldg. 8F
1-2-5 Kyobashi, Chuo-ku, Tokyo, 104-0031, Japan
TEL +81-(0)3-3274-3807

  • 5-minutes walk from JR Tokyo Station, Yaesu Central Gate
  • 3-minutes walk from Tokyo Metro Ginza Line Kyobashi Station, Exit 7
  • 5-minutes walk from Tokyo Metro Tozai Line Nihombashi Station, Exits B1 and B3
  • 7-minutes walk from Toei Asakusa Line Takaracho Station, Exit A6