Attorney Profiles
Attorney at Law
Shoichiro Kajinami

Shoichiro Kajinami has experienced 100+ international and domestic intellectual property (“IP”) dispute cases (litigation, invalidation trial and custom procedure for injunction against imports) including patent, trademark, trade secret and copyright in Japan.


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, although the number of lawyers with technical background is very small in Japan.


Also, he obtained IP LL.M from the University of Washington School of Law in Seattle with “Academic Excellence Award” and then experienced U.S and European practices as a foreign intern at a U.S. law firm (Pillsbury Winthrop Shaw Pittman) in New York and a European law firm (Taylor Wessing) in Munich for around 18 months.


He has the most experience in IP field among Japanese lawyers with similar years of experience.


In addition, Shoichiro often offers IP lectures in Japanese and English at universities (Hitostubashi University, Kobe University, Waseda University and Gakushuin University), Japan Patent Attorneys Association and other organizations.


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 re. overview of IP Litigation at Waseda University (2014)
  • Lecturer re. Trademark Litigation at Kobe University Graduate School of Law (2016, 2022)
  • Lecturer re. FRAND and EU IP Law at Hitotsubashi University Graduate School of Law (2019-2022)
  • Lecturer re. Patent Infringement Litigation at Japan Patent Attorneys Association (2020-2022)
  • AIPPI Development and IP Standing Committee Member(2022)
  • AIPPI IP & Green Technology Standing Committee Observer(2022)
  • Dai-Ichi Tokyo Bar Association, Environmental Protection Committee Member (2022)


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



  • “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