Warren H. Maruyama | Washington, D.C. | Hogan Lovells

Warren H. Maruyama

Senior Counsel Global Regulatory



Maruyama Warren

Warren H. Maruyama
Maruyama Warren
  • Overview
  • Experience
  • Credentials
  • Insights and events

Warren Maruyama focuses his international trade practice on assisting clients in dealing with cutting-edge trade policy challenges, including the Trump administration's efforts to negotiate the U.S.-Mexico-Canada Agreement (USMCA) and the U.S.-EU, U.S.-UK, and U.S.-Japan free trade agreements, and its threats to impose higher duties on U.S. companies and U.S. trading partners under Sections 301, 232, and 201 of U.S. trade law. He advises U.S. and multinational firms on the use of U.S. trade policy and trade law mechanisms and World Trade Organization (WTO) disputes to address market access challenges.

Drawing on his senior-level experience at the Office of the United States Trade Representative (USTR), the White House, and the U.S. International Trade Commission, Warren has advised clients regarding many free trade agreements (FTAs), including NAFTA, Trans-Pacific Partnership (TPP), Transatlantic Trade and Investment Partnership (TTIP), Brexit, and China's WTO accession. He has also advised clients on U.S. FTAs involving Korea, Colombia, Peru, Panama, and Australia.

Warren is recognized for his strategic vision, creativity, and ability to develop innovative, cutting-edge solutions to the trade challenges facing clients. From 2007- 2009, he served as USTR general counsel, overseeing the filing of 10 U.S. WTO and bilateral challenges to foreign trade barriers; helping lead Doha Round and FTA negotiations; developing of Section 301 retaliation lists; and overseeing the USTR's roles in the U.S.-China Strategic Economic Dialogue and Joint Commission on Commerce and Trade. He helped negotiate the so-called "May 10" agreement between the Bush administration and House Democrats, which resolved a decade-long impasse over the role of labor and environmental rules in U.S. FTAs.

Representative experience

Handled successful selection, preparation, litigation, and defense of WTO, U.S.-Canada FTA, and GATT disputes.

Advised PhRMA during the negotiation of new chapters in U.S.-Australia and U.S.-Korea FTAs regarding rules for pharmaceutical price controls.

Represented U.S. steel-consuming manufacturers in opposing Section 201 steel import safeguards and securing their early termination by the Bush administration.

Advised Aluminum Association on Commerce Department's Section 232 investigation.

Secured major breakthrough for U.S. insurance as part of U.S.-Japan "confidence-building agreement" in TPP.

Advised National Council of La Raza pro bono during NAFTA, including establishment of North American Development Bank.

Worked with USTR to end Russian barriers to U.S. poultry exports, Chinese GMO restrictions on U.S. dried distillers grains, and Chinese antidumping investigation of U.S. sorghum.


  • J.D., Cornell Law School, cum laude, 1980
  • B.A., Carleton College, cum laude, 1976
Bar admissions and qualifications
  • District of Columbia
  • Minnesota
Court admissions
  • U.S. Court of Appeals, Federal Circuit
  • U.S. Court of International Trade
  • Appointee, Korea-U.S. Free Trade Agreement Dispute Settlement Roster, 2014
  • Board of Directors, National Council of La Raza, 2004-2006
  • National Advisory Council, Asian Americans Advancing Justice
  • Advisory Council, Clayton Yeutter Institute of International Trade and Finance, University of Nebraska
  • Co-coach, Takoma Tsunami, MSI Classic Soccer League, Girls Select Team, 2001-2007
  • Member, Board of Governors, Japanese-American National Museum


Dispute Resolution: International Trade

Legal 500 US

International Trade: Trade Remedies & Trade Policy (USA) Foreign Expert for Latin America-wide

Chambers Global

International Trade: Trade Remedies & Trade Policy (Nationwide)

Chambers USA

Trade and Customs

Who's Who Legal: The International Who's Who of Business Lawyers

Distinguished Service Award

Office of the U.S. Trade Representative

International Trade and Finance Law

The Best Lawyers in America