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Yasumasa Sakamoto

Partner / Attorney at Law

Osaka Office

Major Practice Areas
Corporate / International Practice / Pharmaceuticals / Healthcare & Beauty
Other Practice Areas
Manufacturing / North America / Southeast Asia
Other Qualifications
Attorney at Law Admitted in New York, U.S.A.
Japanese / English


Yasumasa Sakamoto is a Partner mainly handling corporate legal affairs. Specifically, Mr. Sakamoto handles general corporate matters (especially enterprises with foreign capital) and compliance (harassment investigation, violations of industry regulations, etc.), as well as overseas advancement/withdrawal, cross-border M&A, and dispute resolution. In recent years, assisting Japanese clients in drafting various contracts in English and other local languages when expanding overseas, or if they get into disputes with companies abroad (including litigation, arbitration, etc. in foreign countries) have been increasing in number. Mr. Sakamoto also regularly assists clients when starting their business overseas or they become involved in legal disputes overseas. In recent years, Mr. Sakamoto has also been handling inheritance matters involving foreign nationals, family law-related matters, and criminal cases.

Education & Professional Career

  • Compliance investigations (a number of cases involving quality fraud, harassment, violation of industry regulations)
  • Cross-border M&A involving Japanese manufacturing companies in India and Indonesia
  • Establishing a joint venture company and assisting in overseas advancement of leading Japanese enterprises in Thailand, Vietnam, Indonesia, etc.
  • Legal affairs involving withdrawal of business of leading Japanese enterprises from China and Indonesia
  • Inheritance case of an American citizen living in Japan
  • Criminal case of a foreign national (acquitted)
Jan 2017 – PresentKitahama Partners, Partner
Jul 2015 – Aug 2015 Visiting attorney at Assegaf Hamzah & Partners (Jakarta, Indonesia)
Mar 2015 Admitted to practice in the State of New York
Jan 2015 – Jun 2015Visiting attorney at Rajah & Tann LCT Lawyers (Ho Chi Minh City Office, Vietnam)
Dec 2014Visiting attorney at Anek & Associates International Legal Consultants (Bangkok, Thailand)
Sep 2014 – Nov 2014Intern at Baker & Mckenzie Ltd. (Bangkok Office, Thailand)
May 2014Northwestern University School of Law (LL.M.)
Sep 2011 – Oct 2011Intern at Masuda, Funai, Eifert & Mitchell, Ltd. (Chicago, Illinois, U.S.A.)
Jan 2008Joined Kitahama Partners
Dec 2007Graduated from the Legal Training and Research Institute of the Supreme Court of Japan; Admitted to practice in Japan
Mar 2006Kyoto University Law School (J.D.)
Mar 2004Kyoto University (LL.B.)

Other Activities

Apr 2018Vice Chairperson, International Committee, Osaka Bar Association
Apr 2017Representative Attorney, Employment Consultation Center
Jun 2016Support attorney for pilot projects on small and medium-sized enterprises doing business overseas
Apr 2016 – Mar 2017Adjunct Lecturer, Kyoto University (Preparation for Civil Law-related Documents / Basic Law Exercise A)


  • Member of the International Committee (Osaka Bar Association)
  • Member of the American Chamber of Commerce in Japan
  • Support attorney for small and medium-sized enterprises doing business overseas (Japan Federation of Bar Associations)