Masayuki Yamanouchi

Associate at Anderson Mori & Tomotsune

Masayuki Yamanouchi holds a master’s in science and has been engaged in a number of patent infringement lawsuits and other IP-related matters since he became a lawyer. His main focus is on the pharmaceutical industry, patent infringement actions, as well as licensing negotiations, joint development projects and technology transfer projects. He also has expertise and experience in other forms of intellectual property, including trademarks, copyright and trade secrets. In addition, his experience in the United States (both in law school and at a law firm focusing on patent matters) helps him provide advice to clients involved in patent lawsuits in the United States.


  • March 2002: Keio University (BSc)
  • March 2004: Keio University (MSc)
  • March 2007: The University of Tokyo School of Law (JD)
  • 2007-2008: The Legal Training and Research Institute of the Supreme Court of Japan
  • June 2013: Graduate study, Stanford Law School (LLM)
  • September 2013-June 2014: Associate with Finnegan, Henderson, Farabow, Garrett & Dunner (Palo Alto office)

Recent publications

  • Legal Matters regarding Life Sciences and Health Care - Navigation regarding Regulations, Intellectual Properties and Corporate Matters (Second Edition), Shojihomu Co Ltd (2020)
  • Q&As on IP issues (34th), Calculation of damages in the patent infringement cases, Chizai Prism Vol 18 No 211 2020
  • “The Effective Scope of Protection of Extended Patent Rights”, Chizai Kanri Vol 70 No 3 2020 (Mar 2020)
  • “Check Point of Patent License Agreement - Assuming M&A of a manufacturer company”, Business Law Journal, No 137 (June 2019)
  • Guidebook of English Language Contracts around the World, Shojihomu Co Ltd (April 2019)
  • “Copyright and Other Legal Protection for Business Involving Artificial Intelligence and Big Data”, NBL No 1129 (September 2018)
  • Essential Points of Japan M&A Practice (Second Edition), Shoji Homu Co Ltd (June 2018)
  • “Representations and Warranties in License Agreements”, Business Law Journal, No 124 (May 2018)
  • “Intellectual Property License Agreement Review Guide - Points of Contract Clause Review”, Business Lawyers’ website (October 2017)

Professional associations

  • Daini Tokyo Bar Association

Firm details

Anderson Mori & Tomotsune
Otemachi Park Building
1-1-1 Otemachi
Tokyo 100-8136

Contact details

See firm profile