Professional Experience

Former judge of IP High Court, Tokyo District Court IP Division, and Naha, Kagoshima and Matsuyama District Courts
Litigating Director of Judge Impeachment Court Secretariat
Member of the Legislative Bureau House of Councillors


Japan Federation of Bar Associations (JFBA)
Daiichi Tokyo Bar Association


Tokyo University law faculty

Practice Areas

Intellectual Property Law
Corporate Law, Civil Law



Article (inclusive of co-authored articles)

2007, “Working of an invention in Patent Act”, Theory and practice of Intellectual Property Vol.I, Shinnihonhouki
2008, “Inventorship”, LP Series, Intellectual Property Litigation, Seirin Shoin
2010, “Suits against Patent Infringement, Overview of their trial”, Practice of Intellectual Property Litigation, Housoukai
2012, “Remedy for usurped application”, Practice of Patent-related Litigation, Shoujihoumu
2016, “Patent Infringement”, 100 Questions and Answers of Trademarks, Designs and Unfair Competition Prevention Act cases, Nihon Kajo Publishing
2018, “Unfair Competition of Domain name”, Compendium of Judicial Practice Vol.11, Intellectual Property Litigation Vol.II, Seirin Shoin
2023, “Invention”, For the future of diversifying Intellectual Property Litigation (Festschrift in Honor of Misao Shimizu), Nihon Kajo Publishing