Koji Fukumura
About Koji
Koji focuses on complex commercial litigation, including the defense of securities class actions, derivative suits, M&A-related class actions and government investigations. He also regularly conducts internal investigations for boards, as well as their audit or special litigation committees. Chambers USA has noted Koji as “practical, business-savvy and strategic,” with “great advocacy skills” and a “wonderful leadership presence.” Koji is a former member of Cooley’s board of directors and a past chair of the firm’s securities litigation practice. He also is a past chair of the American Bar Association’s Litigation Section and an immediate-past member of the ABA’s Board of Governors, along with its Audit and Finance Committee and the Standing Committee on Audit.
Passions
Family
Surfing
Golf
As an active litigator and public speaker, I stay on top of the legal, business and regulatory trends in order to counsel and defend my clients effectively.
Admissions and credentials
- California
- Colorado
- Pennsylvania
Rankings and accolades
Forbes: America’s Top 250 Lawyers (2025)
Chambers USA: Securities Litigation – California – Band 1 (2016 – 2025)
The Legal 500 US: Leading Lawyer in Securities Litigation – Defense (2016 – 2025)
Best Lawyers in America:Lawyer of the Year for Litigation – Mergers and Acquisitions – San Diego (2024)
Best Lawyers in America: Lawyer of the Year for Bet-the-Company Litigation – San Diego (2023)
Best Lawyers in America: Lawyer of the Year for Securities Litigation – San Diego (2013, 2019 and 2024)
Best Lawyers in America: Lawyer of the Year for Litigation – Mergers and Acquisitions – San Diego (2012 – 2014, 2018, 2019, 2021 and 2023)
Best Lawyers in America: Leading Lawyer for Commercial Litigation (2009 – 2024); Securities Litigation (2009 – 2024); Litigation – Mergers and Acquisitions (2012 – 2024); Litigation –Regulatory Enforcement (2012 – 2024); Mass Tort Litigation/Class Actions (2020 – 2024); and Bet-the-Company Litigation (2023 – 2024)
Benchmark Litigation: California Litigation Star (2010 – 2024); National Litigation Star (2024)
Benchmark Litigation: San Diego Lawyer of the Year (2019 – 2022)
Southern California Super Lawyers: Top 10 Lawyers in San Diego (2016, 2020 – 2024)
Southern California Super Lawyers: Top 50 Lawyers in San Diego (2009 – 2013, 2015 – 2024)
Southern California Super Lawyers: Leading Lawyer for Securities Litigation (2007 – 2024)
Memberships and affiliations
- American Bar Association (ABA)
- American Bar Foundation
- American Business Trial Lawyers Association
- American Inns of Court
- Federal Bar Association
- Japanese American National Museum
- National Asian Pacific American Bar Association
- U.S.-Japan Council
- Pan Asian Lawyers of San Diego
- San Diego County Bar Association
- Southwest Center for Asian Pacific American Law
- Lawyers Committee for Civil Rights Under Law
An in-depth understanding of the legal issues and a practical approach to resolving matters.
Chambers USA
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