Zenya Onishi

Partner, Tokyo


“For international finance, funds and LBOs he’s one of the best in Japan in terms of knowledge and experience. He’s enthusiastic, fair and tenacious, a great guy to have around.”
Chambers Global 2019


Zenya Onishi is a Partner in White & Case's Asia Debt Finance and Restructuring groups, based in Tokyo. Zenya is a licensed Japanese lawyer (Bengoshi). He has extensive experience in the debt finance area, with a particular focus on leveraged finance, acquisition finance and cross-border syndicated loan transactions. He has a wealth of experience representing financial institutions and borrowers, and he has been active in advising Japanese megabanks as lenders on Japan inbound leveraged finance and Japanese companies as borrowers on acquisition finance for their outbound M&A transactions. He also advised governmental bodies on multinational lending transactions and is further experienced in a broad range of finance matters, including financial markets regulations.

Zenya is ranked as a Band 1 Leading Lawyer for Banking & Finance in Japan by Chambers Global 2019 and Chambers Asia-Pacific 2019, 2020.

Zenya is a member of the Daini Tokyo Bar Association.

Bars and Courts
Columbia University
The Legal Training and Research Institute of Japan
Gakushuin University


White & Case represented Sumitomo Mitsui Banking Corporation, MUFG Bank, Ltd. and Mizuho Bank, Ltd., as mandated lead arranger in connection with the USD165 Million acquisition of LITE-ON Technology Corporation’s Solid State Drive (SSD) business, Solid State Storage Technology Corporation by Kioxia Holdings Corporation (formerly known as Toshiba Memory Corporation)

PayPal Holdings, Inc. on its acquisition of Paidy Inc., a leading two-sided payments platform and provider of buy now, pay later solutions in Japan, for an enterprise value of ¥300 billion, or approximately US$2.7 billion

Awards and Recognition

Leading Lawyer (Band 1): Banking & Finance: Domestic—Japan, Chambers Global 2021 and Chambers Asia-Pacific 2022

Next Generation Partner: Bengoshi: Banking and Finance: International Firms and Joint Ventures—Japan, The Legal 500 Asia Pacific 2022