A&O Shearman makes history with partner hire from elite Japanese firm

Published:
April 9, 2026 12:45 PM
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A&O Shearman has hired Japanese-qualified finance partner Rintaro Hirano from Nagashima Ohno & Tsunematsu in Tokyo.

The hire marks the first time a finance partner has moved from one of Japan’s prestigious Big Four law firms to an international firm.

A&O Shearman Tokyo is set to welcome Japanese-qualified finance partner Rintaro Hirano from Nagashima Ohno & Tsunematsu in a market first.

The debt finance specialist joins from one of Japan’s elite Big Four law firms in what is a very unusual lateral move for the Japanese market.

Nick Wall, A&O’s regional managing partner for Japan and Korea, said the move was “the first time a finance partner has moved from a Big Four Japanese law firm to an international firm.”

He pointed to an increase in inbound M&A creating more demand for private capital expertise. “It gives us a Japanese-law leveraged finance capability that is rare among international firms in Japan,” he added.

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Hirano, whose practice spans leveraged finance, project finance and M&A finance, joined Nagashima Ohno & Tsunematsu in 2001 and was made partner in 2016.

A&O’s Tokyo office currently has around seven partners, with most focusing on cross-border M&A, finance, projects, energy and infrastructure finance deals.

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