Attorney Profiles
Attorney at Law
Shoichiro Kajinami

Shoichiro Kajinami experienced more than 50 IP litigation cases including Patent, Trademark, Trade Secret and Copyright, and a wide variety of corporate cases.  Especially, he is strong at cases related to technical issues because he has technical background: obtaining Bachelor of Electrical Engineering from Waseda University where he mainly studied semiconductor related to clean energy.


Also, he studied the U.S. IP laws in the IP LL.M program at University of Washington School of Law in Seattle, and then was admitted to the State of New York and Washington. Further, he worked as a foreign intern at Pillsbury Winthrop Shaw Pittman law firm (New York) and Taylor Wessing law firm (Munich) where he learned the U.S. practice and European practice. Utilizing the experience, he has handled international cases.


IP LL.M, University of Washington School of Law, Seattle, U.S 2017

Juris Doctor, Gakushuin University Law School, Tokyo, Japan 2009

Bachelor of Electrical Engineering, Waseda University, Tokyo, Japan 2006


Attorney at Law (Japan) 2010

Attorney at Law (The State of New York) 2018

Attorney at Law (The State of Washington) 2019


Abe, Ikubo & Katayama (2010- )

Pillsbury Winthrop Shaw Pittman law firm (New York) (Foreign Intern, 2017-2018)

Taylor Wessing law firm (Munich) (Foreign Intern, 2018)


Academic Excellence Award (IP LL.M, University of Washington School of Law, 2017)

Activities For Government Related Committees and Education

・Lecturer at Waseda University (Basic of Intellectual Property at the Open Education Center) (2014)


・Lecturer at Kobe University Graduate School of Law (2016)


・Lecturer at Hitotsubashi University Graduate School of Law (Class of “Legal Aspects of IP Strategy” for “EU IP Law” and “FRAND”) (2019)

Lectures / Presentations

・Presentation “Overview of Patent Litigation in Japan” AIPLA Spring Meeting (Philadelphia), May 16, 2019


・Presentation “Issues on IP regarding AI, based on Contract Guidelines on Utilization of AI and Data in Japan” AIPLA Annual Meeting IP Practice in Japan Committee Pre-Meeting (Washington D.C.), October 22, 2019


・“Basics of patent practice common in Japan and the U.S.” Gakushuin University Law School, Legal Research Institute, February 21, 2020

Publications and Articles

“First Judgement Applying Criteria of FRAND Declaration by IP High Court” Patents & Licensing (Vol.45, No.4 Issue No.260 December 2015) IP・L Communications


“Some Main Laws to be Considered when Developing IoT business in Japan” (Taylor Wessing “Plugin” #14)


“Legal Analysis on Artificial Intelligence (AI) in Japan” Patents & Licensing (Vol.49, No.1 (Issue No.281) June 2019) IP・L Communications


“Overview of Trademark Practice in Japan” Patents & Licensing (Vol.49, No.5 (Issue No.281) February 2020) IP・L Communications