Skip to main content
松平 定之
松平 定之


  • Partner
  • Tokyo

Utilizes his extensive experience to support international energy companies and investors in projects, transactions, and businesses in the energy sector.

Sadayuki has a wealth of experience in supporting international clients in projects, transactions, and businesses in the energy sector. Sadayuki advises his clients on the best solutions for achieving their business goals based on his deep understanding of the relevant laws and regulations and practices in the full energy supply chain. He also has expertise in carbon-neutral projects and businesses, such as renewable power projects and hydrogen projects, as well as pioneering businesses involved in recent developments in the electricity market and the regulations thereon. Sadayuki serves as a member of an industrial safety rules committee and a hydrogen safety strategy committee, both of which were established by the Ministry of Economy, Trade and Industry of Japan, and also is a member of an electricity capacity market committee, which is part of the Organization for Cross-regional Coordination of Transmission Operators, Japan (OCCTO).

Representative Work

Awards & Rankings

N&A Newsletters





The University of Michigan Law School (LL.M.)
The University of Tokyo (LL.B.)

Professional Experience

Regional Vice Chair, Asia Pacific of the Energy Group of Lex Mundi 
Debevoise & Plimpton LLP, New York 
Mizuho Securities Co., Ltd.