I want to earn my clients’ trust by understanding their needs, proposing tailored support and working to exceed expectations.

Yasushi Hamashima

EY-Parthenon Japan Transaction and Corporate Finance Leader; Partner, EY Strategy and Consulting Co., Ltd.

Building high performing teams through collaboration and communication.

Areas of focus

Yasushi Hamashima is the EY Japan Transactions and Corporate Finance Leader and a partner of EY Strategy and Consulting Co., Ltd. He assumed his current role in July 2025.

He began his career in the international division of a predecessor firm of Ernst & Young ShinNihon LLC, where he conducted audits for major trading companies and US-based investment funds.

He later broadened his experience at an investment and consulting firm before returning to the EY network and joining Ernst & Young Transaction Advisory Services (now EY Strategy and Consulting Co., Ltd.).

His international experience includes the period 2011-13 when he was based in the UK, where he worked on financial advisory services for European transactions while seconded to the M&A team at the London branch of a major financial institution.

After returning to Japan in 2013, he led and oversaw financial due diligence services in the Transaction Diligence division, with a focus on private equity funds. 

Shape the future with confidence

“When trust exists between a client business and our firm, it is built through the relationships of the people involved. That’s why I value and stress the importance of nurturing strong personal relationships with my clients and earning my place as their trusted advisor. Like every EY professional, I want to deliver value and prove my commitment to my clients so that I can play my part in building a better working world.

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