Editorial · Brief · Japan · Published 10 November 2026

Withers partner Hiroko Nihei authors IP arbitration chapter in Kluwer guide to Japan

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Hiroko Nihei contributes the intellectual property arbitration chapter to a Kluwer guide to Japanese arbitration, and separately leads a new Withers Tokyo practice.

Hiroko Nihei, a partner at Withersworldwide, has contributed to Arbitration in Japan: A Practitioner's Guide, published by Kluwer Law International. Conventus Law reports that she wrote the chapter on intellectual property arbitration. The guide provides a comprehensive overview of Japanese arbitration law and practice, according to Conventus Law. It covers sector-specific arbitration, investment treaty arbitration, document production, emergency arbitration, third-party funding and multi-party arbitration, and includes detailed commentary on the Japanese Arbitration Act of 2023. Separately, Law.asia reports that Withers has hired Nihei to lead its newly established arbitration and litigation practice in Tokyo. She joins from Hillford Law, a firm she co-founded after the closure of O'Melveny & Myers' Tokyo practice. Eric Roose, who leads Withers' Tokyo office, told Asia Business Law Journal that growing cross-border activity prompted the launch. Law.asia reports the practice will serve clients across a range of sectors, with particular emphasis on technology, media, internet and financial services. Roose said the team will support companies facing multi-jurisdictional commercial disputes. Nihei will work closely with dispute resolution colleagues across Withers' global network.

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