Insurance-related accounts (Tables)

12 Months Ended

Mar. 31, 2017

Insurance [Abstract]

Policyholders' Account in Life Insurance Business

Policyholders’ account in the life insurance business is comprised of the following:

	Yen in millions
	March 31
	2016		2017
Universal life insurance		1,634,642		1,809,142
Investment contracts		638,737		686,182
Other		127,941		135,749
Total		2,401,320		2,631,073