Kuzuwa Law Officelaw 2

Kuzuwa Law Office

We handle general corporate legal affairs, focusing on the field of intellectual property, such as patent law, trademark law, design law, copyright law, and unfair competition prevention law.
In the field of intellectual property, we will provide one-stop support by collaborating with Kuzuwa & Partners, P.C.


IP-related disputes

  • Invalidation Trial before JPO Trial Board
  • Appeal to IP High Court for cancellation of JPO Board of Appeal decision or Trial Board decision
  • Infringement litigation before District Court and/or IP High Court, warning letters and/or negotiations vis-à-vis infringements
  • Countermeasures against counterfeit products (procedures for injunction at customs, responses on websites, warnings, etc.)

Expert Opinion, Licensing, Consulting

  • Expert opinion (Appraisal) on validity/infringement of IP rights
  • Preparation and review of license agreements, joint application agreements, assignment of rights agreements, etc.
  • Preparation and review of employee invention regulations
  • Proposal of IP strategy

Services related to Regulatory Affairs

  • Trial for Invalidation of Extension Registration
  • Advice on acquisition, defense, and attack of regulatory-affairs-related IP rights
  • Advice on the Pharmaceuticals and Medical Devices Law

Corporate Legal Affairs (Japanese Law)

  • Advice on the Copyright Law
  • Advice on the Act on Unjustifiable Premiums and Representations
  • Advice on the Act on the Protection of Personal Information
  • Advice on legal issues related to Internet business
  • Other general corporate legal affairs

Our People

Yurie Kuzuwa

J.D., Attorney at Law, Patent Attorney


  • Attorney at Law (registered in 2016)
  • Patent Attorney (registered in 2022)


After graduating from Waseda University, the School of Culture, Media and Society, Ms. Kuzuwa further completed the Law School of the same university and gained Juris Doctor Shortly thereafter. She passed the Bar Examination in 2015, and via official training course of lawyers she started her career in 2017 at Yahoo Japan Corporation as an in-house lawyer and experienced a lot of legal affairs, litigations, M&A, etc. in various Internet businesses. She joined our firm in 2022 and was registered as a patent attorney in the same year. Since 2023, she has been an attorney at law at Kuzuwa Law Office as well as Kuzuwa & Partners, P.C.

Publications“Q&A on Legal Regulations and Practical Responses to Advertisement Display” (co-author), Chuokeizaisha (2019)
Practice AreasIP-related disputes and litigations, Licensing, Corporate legal affairs in general, Trademarks and Designs

Office Information

NameKuzuwa Law Office
LocationNishi-Shinjuku Mitsui Bldg. 17F, 6-24-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo 160-0023, Japan 
Telephone Number++81-3-5321-6762(Reception: Weekdays 11:00~16:00)

Please note that we do not provide legal consultations only by telephone.