Yoshi is a founding partner of Ikeda & Someya, a Japanese antitrust boutique established in October 2018. He served as an investigator at the JFTC and was in charge of the implementation of the leniency programme. Before establishing Ikeda & Someya, Yoshi worked for Mori Hamada & Matsumoto. He graduated from Kyoto University (LLB) and the University of California, Berkeley, School of Law (LLM). He is admitted in Japan, New York and California.