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Shuzo Maruyama

Shuzo Maruyama


A former Japanese judge and litigator, Shuzo Maruyama, focuses his practice on US patent litigation involving leading Japanese corporations. 

Based on his ten-year trial experience together with his three-year intensive study in a prominent US law school (where he obtained his J.D.), he offers Japanese companies crucial insight and invaluable advice with regard to cross-border patent cases. Most recently, he secured a complete victory on behalf of major Japanese automotive companies in a multi-patent, multi-respondent ITC case with corresponding district court litigation. 

He also has particular experience in a wide range of complex commercial, civil, administrative litigation and licensing, and cross-border trademark cases.

Bar admissionsIllinois
CourtsUnited States District Court for the Northern District of IllinoisUnited States District Court for the Eastern District of TexasUnited States District Court for the Eastern District of Michigan
  • J.D., Boston University School of Law 2013
    Concentration in Intellectual Property
    Editor, Boston University International Law Journal
  • B.A., Economics, Keio University 1997


Chambers USA

  • Band 4, Illinois Intellectual Property (2024)

Chambers Global

  • Spotlight Table Foreign Expert, USA Intellectual Property (Foreign Expert for Japan) (2021 - 2024)
The Legal 500 United States
  • Recommended, Patents: Litigation (International Trade Commission) (2020)
Other recognitions
  • Shuzo received the 2019 Award for Excellence in Pro Bono Service, United States District Court and the Chicago Chapter of the Federal Bar Association

Prior Experience

  • Summer Associate, Intellectual Property Litigation Group, Chicago-based international law firm (Chicago, 2012)
  • Judicial Intern, Hon. William G. Young, United States District Court Judge for the District of Massachusetts (Boston, 2011)
  • Associate, Tokyo-based law firm (Tokyo, 2006-2010)
  • Attorney, Litigation Department of the Ministry of Justice (Fukuoka, 2003-2006)
  • Judge, Osaka District Court (Osaka, 2000-2003)

Memberships And Affiliations

  • Registered with the Japan Federation of Bar Associations
  • Tokyo Bar Association
  • Japan America Society of Chicago
  • Japanese Chamber of Commerce & Industry of Chicago