Attorney profiles

Tomohiro Yoneyama

Practice Areas

Tomohiro Yoneyama is a partner at Abe, Ikubo & Katayama, where his practice focuses on matters involving intellectual property as well as restructuring and insolvency/bankruptcy. Especially, he has been engaged in the following matters for both Japanese and non-Japanese clients.

1. Dispute resolution involving patents
・ Representing clients in infringement lawsuits before the courts, invalidation trials before the Japan Patent Office and appeals to the Intellectual Property High Court, and import suspension proceedings before Japanese customs
 Representing clients in the above matters involving a variety of technology areas and industries, including mobile telecommunication devices, semiconductors, optical lenses, optical media and pharmaceuticals

2. Countermeasures against counterfeits
・ On behalf of clients, sending cease and desist letters, asserting infringement of trademark rights or unfair competition.

3. Assistance on contract negotiations involving intellectual property
・ Drafting license agreements

4. Restructuring and insolvency/bankruptcy
・ Serving as trustees in bankruptcy proceedings (similar to those under U.S Chapter 7) and deputy trustees in restructuring proceedings (similar to those under U.S. Chapter 11), and filing petitions for commencement of bankruptcy proceedings


  • Japanese (first language)
  • English


  • New York (2014)
  • Japan (2006)


  • Network of Japanese Restructuring Lawyers


2013 New York University School of Law, LL.M.
2003 Keio University, LL.B.

Professional Experience

2016 to date Lecturer at Kobe University Graduate School of Law
2013-2014 Kirkland & Ellis LLP (Chicago), Visiting Attorney
2008-2009 Seconded to the Department of Justice of Japan, serving under the Counselor of Civil Affairs Bureau, as a fixed-term government employee


  • April 2017
    JP Supreme Court rendered decision on doctrine of equivalents (Abe, Ikubo & Katayama IP Newsletter)
  • April 2016
    Protection of trade secrets by the Unfair Competition Prevention Act revised in 2015 (Patents & Licensing (Vol.45, No.6 (Issue No. 262)))
  • March 2016
    Risks of lawsuits to be instituted by foreign shareholders in case stock prices fall due to scandals (Junkan Shoji Homu, No. 2095)
  • March 2015
    Study of the Bankruptcy Act Vol. 3
  • June 2014
    Practice of drafting contracts and contract forms
  • August 2009
    Interpretive issues after the commencement of the electronic book-entry transfers of shares (Junkan Shoji Homu, No. 1873)
  • August 2009
    Summary of the Japanese State Immunity Act (Gekkan Minjiho Joho No. 275)
  • July 2009
    Summary of the Japanese State Immunity Act (NBL No. 908)


  • April 2019
    IP court's decision update: a case where indirect infringement was found (Seminar hosted by Abe, Ikubo & Katayama)
  • July 2018
    IP Court's decision update: construction of antibody claims functionally recited (Seminar hosted by Abe, Ikubo & Katayama)
  • May 2018
    Recent amendment to IP laws and systems relating to big data (Seminar hosted by Lee & Ko and Abe, Ikubo & Katayama)
  • July 2016
    Preparation for securities litigation to be filed by foreign investors (Seminar hosted by Financial Facsimile News)
  • October 2015
    Tips on drafting Contracts (Seminar hosted by Shoji Homu)
  • February 2011
    Contract drafting 101 (Seminar hosted by Nihon Keiei Kyokai)