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This content is provided by Yoshikazu Iwase.

Practice Areas

Intellectual property law. Patent litigation, licensing deals, trademark litigation, copyright litigation, unfair competition, IP transactions.

Yoshikazu's litigation experience involves a number of patent infringement trials and revocation suits against the trial decisions of the Japanese Patent Office concerning patentability/validity of patents over various technologies. He has also been involved with a wide range of trademark/trade dress and copyright infringement suits, licensing and IP assets transfer transactions, and dispute resolution. Mr. Iwase has provided a wide range of advice regarding U.S. patent infringement issues in Japan. His experience also includes drafting and negotiating licensing, patent and various intellectual property transfer agreements, transactions and due diligence of intellectual property in the course of M&A deals.


Admitted in Japan (1997), New York (2004), Japan Patent Attorney (2005)

Professional Memberships

Daini Tokyo Bar Association; The Japan Patent Attorneys Association (2005 - present); International Trademark Association (2004 - present)

Japan Trademark Association (2004 - present); AIPPI JAPAN (2005 - present); LES JAPAN (2005 - present)


Pharmaceutical IP and competition law in Japan: overview Practical Law Global Guides

Mar 2018; Getting the Deal Through - Life Sciences 2015 (Japan Chapter) Getting the Deal Through - Life Sciences 2019