Tsuyoshi Kageyama

Tsuyoshi is the managing attorney at AMPACC Japan. He has been a member of the Japan Patent Attorney Association since 2004 and has extensive experience in intellectual property law. He has served as both in-house counsel and senior patent counsel for premier technology companies, and as a veteran patent attorney, he has procured patents and developed patent portfolios for internationally recognized companies.

Tsuyoshi focuses his legal practice on drafting patent applications conducting patent invalidity and infringement studies, and guiding his clients in obtaining and enforcing robust intellectual property rights.


Focus Areas

  • Patent Procurement
  • Patent Disputes
  • Licensing


  • Queen Mary University of London, MSc. (Intellectual Property Management)
  • Waseda University, B.Eng., Mechanical Engineering