Alvin Hiromasa Shiozaki

Founder and Attorney-at-Law (bengoshi) at Shiozaki Legal in Tokyo, Japan

Alvin Hiromasa Shiozaki has broad international experience advising multinational companies over his legal career. Alvin focuses his practice in competition / antitrust law, and he has played a leading role in defending many clients against investigations by JFTC and other competition law authorities in multiple jurisdictions.  Alvin also advises clients on cross-border investments into Japan and M&A, luxury hotel management and operations, compliance, whistleblower reporting and employment law. On non-Japanese matters, he works closely with his network of very talented lawyers in many jurisdictions around the world who he has worked with before. 

Contact Details


  • Compliance
  • Cross-border M&A
  • Cross-border transactions
  • Dismissal (employment)
  • Dispute resolution
  • Employment tribunal
  • Foreign direct investment
  • Japan Fair Trade Commission
  • Whistleblower
  • Company & Commercial
  • Competition & Antitrust
  • Employment & Labor
  • Leisure & Tourism


  • English - Native/bilingual
  • Japanese - Native/bilingual

Qualified in

  • Japan