Osaka International Law Offices Lawyers

  • Contact Person Name : Rei HIDAKA
  • Establishment year :
  • Attorney in main Office : -
  • All Attorney : 1
  • Affiliation :

Firm OverviewContact Us

Mr. Koshi Yamaguchi established his own law office in 1994 after eight years as a partner in charge of international matters at one of the largest law firms in Osaka. Mr. Nobuaki Matsuoka, who joined the firm as an associate in 1995, became a partner in 2004. Four Japanese associate attorneys assist them along with an Of Counsel attorney. Mr. Yamaguchi earned a Master of Laws from Harvard Law School, and Mr. Matsuoka has spent an extended period in residence with a foreign law firm. This provides clients with a cross-legal expertise that is unique in Osaka, and of particular relevance to international business. Legal services are provided in all areas of Japanese domestic law without limitation.
The firm's clients consist principally of Japanese companies active throughout the world and foreign companies with interests in Japan. Professional relationships have therefore been established and are on-going with selected law firms in many of the world's major cities.


Area of Practice

Antitrust and Trade Regulation
Business and Commercial
Family Planning
Intellectual Property Law
International Law
Litigation and Appeals
Competition Law

Lawyer's Profile


Name: Mr. Koshi Yamaguchi


Bachelor of Laws (LL.B.) from Kyoto University in 1975
Admitted to practice in 1977 after completing the national law school curriculum administered by the Legal Training and Research Institute of the Supreme Court of Japan. In 1980, he was awarded a Master of Laws (LL.M.) by Harvard Law School after a year of course work in the American Legal Studies Program


In April 1999, he was elected a Vice-President of the Osaka Bar Association, and served in that position through March 2000
He was a member of the 2001 Freedom of Information Act research group established by the Japan Federation of Bar Associations
He was also a vice-president of the Danish Chamber of Commerce for Western Japan (DCCWJ) from 1998 to 2004, and has been a president of DCCWJ since 2004
Was an arbitrator with the Korean Commercial Arbitration Board in 2004, and since April 2004 has been an adjunct faculty at Ritsumeikan University Law School in Kyoto

Clients / Practice

Clients :


Misc. Information

Contact Us