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Hiroyuki Masuda


Hiroyuki Masuda graduated from Doshisha University with a Bachelor of Law degree and subsequently Kyushu University with a Juris Doctor degree. He was called to the Japan bar in 2011.

Masuda started his career at one of the biggest pharmaceutical companies in Japan, Shionogi & Co., Ltd., as an in-house counsel, where he assisted in various kinds of corporate and commercial transactions in pharmaceutical industries and international M&A transactions.

Thereafter he joined Asunaro Law Office which is well known in the Osaka area for legal support for SMEs with a wealth of expertise in M&A and corporate restructuring. At Asunaro, he advised various companies in a wide range of industries in all aspects of the M&A process, including transaction structure planning, undertaking and managing due diligence, and drafting and negotiating all relevant documentation and execution. He also advised and represented various corporate clients in lawsuits on diverse issues arising out of disputes in relation to corporate alliance such as conflicts on the control of corporations in Japan.

Throughout his career, Masuda has extensive experience in offering a comprehensive range of law services covering corporate and commercial transactions and corporate alliance activities from large-scale or public listed companies to SMEs in Japan and overseas.

Drawing on his experience, Masuda focuses on advising companies in their activities regarding corporate alliance or collaboration by or through M&A, investment, making a business partnership and establishing JV in ASEAN countries.




Areas of Practice


Bachelor of Laws, Doshisha University

Juris Doctor, Kyushu University


Japan Federal Bar Association and Osaka Bar Association

Ministry of Law—Certificate for Foreign Lawyer to Practise Foreign Law in Singapore

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