Seiji Niwa | White & Case LLP International Law Firm, Global Law Practice
 Seiji Niwa
 Seiji Niwa

Seiji Niwa

Counsel, Tokyo

T +81 3 6384 3173

E [email protected]


Seiji Niwa is counsel in White & Case's global competition, white collar and commercial litigation practices. He concentrates on complex commercial litigation and antitrust litigation and counseling. He has worked on both civil and criminal antitrust issues, and has substantial experience with multijurisdictional cartel matters and in counseling trade associations. As a member of the Tokyo Office's Competition Group, Mr. Niwa works on matters involving the Japan Fair Trade Commission, including investigations of unfair trade practices and of cartels.

Mr. Niwa also has experience with securities fraud and bankruptcy litigation, and has conducted a number of compliance reviews pursuant to the Foreign Corrupt Practices Act. He has represented clients in the retail, financial services, pharmaceutical and display technologies industries, among others. In 2008, he was a judicial clerk for the Honorable Roslynn R. Mauskopf of the United States District Court for the Eastern District of New York.

Mr. Niwa is the Vice Chair of the American Chamber of Commerce of Japan’s Competition Policy Task Force and a member of the Chamber’s External Affairs Advisory Council.

Prior to joining White & Case, he worked for the United Nations.

Mr. Niwa is a member of several professional associations, including the American Chamber of Commerce in Japan, the Daini Tokyo Bar Association, and the American Bar Association.

Bars and Courts

  • New York State Bar
  • Registered Foreign Attorney in Japan (Gaikokuho Jimu Bengoshi)


  • JD, Columbia University School of Law
  • MALD, The Fletcher School of Law & Diplomacy, Tufts University
  • BA, University of Virginia


  • English


Speaking Engagements

"Recent Global Developments in Competition and Anti-Corruption Law", September 2013: Annual "Back-to-Business", (speaker)

"Global Seminar: Recent Developments in Competition and Anti-Corruption Law", September 2013: Japan Machinery Center for Trade and Investment

"The Emerging Risks of Unauthorized IP in your Supply Chain and How You Should Respond", September 2013: Webinar hosted by the Business Development Academy, (presenter)

"Information Exchange and Collaboration Among Competitors", April 2013

"United States Compliance Issues when Dealing with Competitors: Cartel Conduct, Joint Ventures and Trade Associations", July 2010


  • The Emerging Risks of Unauthorized IP in Your Supply chain and How You Should Respond, White Paper, August 2013, (co-author)
  • Managing legal risks related to unauthorized intellectual property and US unfair competition laws (無許諾知財の使用に巻き込まれることによるリスクおよび対策―米国の不公正競争防止法の観点から), NBL No. 999 (in Japanese), April 15, 2013, (co-author)
  • Japan Fair Trade Commission Watch, April 2013, August 2012, January 2011, September 2010, July 2010
  • US Court Rules Maritime Law Preempts UCC, Financial Services Advisory Update, May 2007