Regan Yamasaki

  • Biography
  • Key Cases

Regan Yamasaki specializes in antitrust, class action, and complex business disputes. His ongoing pursuit of learning, self-improvement, and solving perplexing challenges led him to the practice of law and guides him to this day.

In his current role with the firm, Regan has identified critically important evidence by leveraging metadata to pinpoint pivotal documents otherwise buried in voluminous document productions. This includes key support for class certification and communications between alleged co-conspirators in complex class action cases against major chemical manufacturers accused of price collusion and anticompetitive practices.

Regan’s review experience encompasses a broad spectrum, including patent and securities litigation, antitrust and government investigations, corporate accounting and financial disclosures, product defect litigation, and assorted intellectual property matters.

Before joining the firm, Regan was corporate counsel for the Napa, California-based JY Law Firm PC, where he managed work product and law enforcement compliance matters for a well-known international advertising company. He also trained the firm’s corporate finance team regarding intellectual property, privacy, and compliance matters.

Prior to his corporate counsel position, Regan was a successful contract attorney for several prestigious law firms, including Cooley LLP and Morrison & Foerster LLP. Highlights included:

  • co-coordinated review workflow and logistics for a team of over 20 review attorneys
  • employed forensic data analysis tools—including author domain reports, document metadata filters, and concept clusters—to isolate and review substantial volumes of responsive data in an efficient and cost-effective manner
  • supported litigation partners and associates for various needs, including rolling document productions, privilege and redaction logging, deposition preparation, expert discovery, and trial exhibit selection and compilation

Regan has participated in the Bar Association of San Francisco’s Volunteer Legal Services Program.

  • Altria-JUUL E-Cigarette Antitrust Litigation
  • Diisocyanates Antitrust Litigation: The firm represents plaintiffs Utah Foam Products, Inc.; NPC Coatings, Inc.; Rhino Linings Corporation, Tri-Iso Tryline LLC, and a prospective class in an antitrust action against Bayer, Covestro, BASF, Dow Chemical Company, and other related companies and conspirators. Plaintiffs allege defendants engaged in a scheme to fix, raise, and maintain prices at supracompetitive levels for methylene diphenyl diisocyanate and toluene diisocyanate products sold in or shipped to the United States from at least January 1, 2016-present.