Takayuki Ono

TAKAYUKI ONO represents clients facing significant crisis situations, government and internal investigations, and complex commercial litigation. Tak’s practice primarily focuses on matters that involve challenging cross-border and multi-jurisdictional issues. He also has broad litigation experience, which includes arguing dispositive and discovery motions, taking and defending depositions of fact and expert witnesses, and drafting major briefs in complex cases. He has represented clients in the automotive, biotechnology, energy, financial, healthcare, medical devices, pharmaceutical, retail, and technology industries.

As one of the very few Japanese-English bilingual lawyers in the U.S. focusing on high-stakes investigations and litigation, Tak draws on his deep understanding of Japanese business culture and language skills to assist multinational companies and their U.S. and Japanese subsidiaries.

Prior to joining Sidley, Tak assisted the U.S. Department of Justice and the Securities and Exchange Commission in prosecuting fraud allegations against large corporations. He worked with federal prosecutors to investigate companies by identifying and interviewing key witnesses, reviewing and assessing corporate documents, collecting and analyzing relevant data, and evaluating potential legal claims. Tak was also an antitrust associate at a major international law firm, assisting clients facing government investigations and litigation involving allegations of anticompetitive conduct.

In a previous career, Tak served as a professional journalist after graduating from Northwestern University’s Medill School of Journalism, one of the premier journalism schools in the world. As a news reporter, he conducted live, on-air reports and interviews for an award-winning television news station in Wisconsin.

Tak is passionate about increasing diversity, equity, and inclusion in the legal profession and is actively involved in strategies and initiatives that promote those goals. He is the past chair of the Chicago Committee on Minorities in Large Law Firms. He also serves in a leadership role on the Associate Diversity Council in Sidley’s Chicago office.