Hiroshi Ishihara

Hiroshi Ishihara


Hiroshi Ishihara specializes in international and domestic corporate law matters including M&A, business reorganization, antitrust law, real estate and intellectual property transactions. In connection with M&A transactions, he has extensive experience in cross-border M&A, business integration between listed companies, joint ventures and intragroup reorganizations. Also, he advises on many international commercial transactions, such as negotiation for a license agreement, manufacturing agreement and other agreements between Japanese and overseas companies. For domestic corporate matters, he advises on corporate crisis management and operation of shareholders’ meetings. He also specializes in healthcare and life sciences industry and handles many transactions and regulatory issues, including regulations with respect to regenerative medicines.

Prior to joining Anderson Mori & Tomotsune, Hiroshi served as a lawyer at Nishimura & Asahi, Kirkland & Ellis LLP and Bingham Sakai Mimura Aizawa. Also, He has experience working for the Bank of Japan as well as one of the largest general trading companies in Japan.

Hiroshi is a qualified Japanese lawyer (bengoshi) as well as a qualified lawyer in New York and California.

Ishihara Hiroshi

Practice Areas

Practice Groups

  • Corporate Transaction Group
  • Intellectual Property Law Group
  • Asia and Emerging Countries Practice Group
  • Life Sciences and Health Care Practice Group


1997 University of Tokyo (Bachelor of Economics)
1998 - 2000 The Legal Training and Research Institute of the Supreme Court of Japan
2004 Keio University (LL.B.)
2005 Columbia University School of Law (LL.M.)
2005 - 2006 Associated with Kirkland & Ellis, Los Angeles


Jun 2018
Sep 2017
English Contracts around the World – Around-the-world trip starting from America The Association of Corporate Legal Departments, No.518
Apr 2017
Oct 2016


X-HUB TOKYO INBOUND PROGRAM 2023 Tokyo Metropolitan Government, Deloitte Touche Tohmatsu LLC, JETRO
Dec 15, 2022
X-HUB TOKYO INBOUND PROGRAM 2021 Tokyo Metropolitan Government, Deloitte Touche Tohmatsu LLC, JETRO
Feb 15, 2021
Guidance on English Language Contracts around the World Anderson Mori & Tomotsune, LexisNexis Japan, Co., Ltd
Sep 11, 2019
Cross Border Transactions Chambers and Partners
Feb 26, 2019
Jul 19, 2018
Indemnification regarding Regenerative Medicine Products (Current Status and Issues) Japan Pharmaceutical Industry Legal Affairs Association Sub Committee
Jan 26, 2018
Overview of the Medical Big Data Act Anderson Mori & Tomotsune
Nov 30, 2017
Mar 3, 2017
Feb 25, 2017
Legal Regimes and Issues regarding Regenerative Medicine International Corporate Counsels Association
Jan 27, 2017


Professional Admissions

  • Japan (2000)
  • California (2006)
  • New York (2007)

Professional and Academic Associations

  • Dai-ichi Tokyo Bar Association
  • New York State Bar Association
  • State Bar of California


  • Japanese (first language)
  • English