Image: Sachiko Taniguchi

Sachiko Taniguchi

Associate, Litigation Department


Sachiko Taniguchi is a senior associate based in New York.  Ms. Taniguchi is a member of the firm’s Complex Litigation and Arbitration practice group.  Her practice focuses on representing multi-national clients in U.S. federal and state courts and domestic and international arbitration proceedings, in high-stakes commercial disputes across various industries ranging from construction machinery, healthcare, pharmaceuticals, biotechnology, and commercial real estate.

Ms. Taniguchi is also uniquely qualified to represent Japanese clients in cross-border disputes, because of her strong cultural fluency, bilingual skills, native Japanese background, and training as a U.S. litigator and international arbitration practitioner.  With Ms. Taniguchi, Japanese clients can overcome language and cultural barriers, and work directly with the firm on all phases of litigation, both on strategies and execution.  She has represented leading companies throughout the world, and has handled all phases of litigation with extensive trial experience.


  • The Legal 500 USA, International Arbitration (2022)
  • Recognized as Ones to Watch in Japan, Litigation – The Best Lawyers in Japan (2022, 2023)


  • The University of Chicago Law School, LL.M., 2017
  • The Legal Research and Training Institute of the Supreme Court of Japan, 2013
  • Waseda University Law School, J.D., 2011
  • Waseda University School of International Liberal Studies, B.A., 2007 (First in Class of 2008; Graduation in 3.5 Years)
  • Grinnell College, Exchange Program, 2005-2006


  • Represented Mitsubishi Tanabe in an ICC arbitration involving a royalty payment dispute across multiple jurisdictions around the world and obtained a final award worth more than US$2 billion, rejecting every challenge to the IP license agreement at issue as well as awarding more than $22 million in fees and costs.
  • Represented a Japanese pharmaceutical company in a patent/know-how licensing dispute, simultaneously litigated in New York Supreme Court, English High Court, and ICC international arbitration, all of which were successfully settled in the client’s favor.
  • Represented a U.S. biotechnology company in multiple proceedings in arbitration and U.S. district courts, relating to its gene therapy technology and accusations of patent infringement, contract breaches, fraud, and other business torts.
  • Representing a leading U.S. real estate holdings company in confidential U.S. domestic arbitration proceedings involving a high-stakes breach of fiduciary duty dispute before a panel of three former U.S. federal judges.
  • Represented a U.S. technology company in a complex trade secret dispute before a U.S. District Court in Manhattan, which was successfully settled.
  • Represented a construction machinery company in connection with a proceeding involving numerous disputed issues under multiple contracts.
  • Represented a Japanese steel company in an international investigation in connection with a U.S. government initiative.
  • Represented a U.S. multinational, pharmaceutical, and medical technologies company in a worldwide internal compliance and investigation matter.
  • Represented a U.S. company offering a wide range of products for various research fields, such as biopharma, molecular spectroscopy, and clinical, in connection with its internal investigation relating to its Japanese subsidiary.

Engagement & Publications



  • Member of Daini Tokyo Bar Association

Practice Areas


Complex Litigation and Arbitration

International Arbitration

Investigations and White Collar Defense

Life Sciences and Healthcare

Intellectual Property





District of Columbia Bar

New York Bar



The University of Chicago, LL.M. 2017

Waseda University, J.D. 2011

Waseda University, B.A. 2007

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