Employee benefit plans

6 Months Ended

Sep. 30, 2017

Employee benefit plans

Employee benefit plans

11. Employee benefit plans:

Nomura provides various pension plans and other post-employment benefits which cover certain employees worldwide. In addition, Nomura provides health care benefits to certain active and retired employees through its Nomura Securities Health Insurance Society.

Net periodic benefit cost

The net periodic benefit cost of the defined benefit plans of Japanese entities’ includes the following components.

	Millions of yen
	Six months ended September 30
	2016			2017
Service cost	¥	4,459		¥	5,018
Interest cost		722			1,129
Expected return on plan assets		(3,002	)		(3,033	)
Amortization of net actuarial losses		1,424			2,003
Amortization of prior service cost		(574	)		(530	)
Net periodic benefit cost	¥	3,029		¥	4,587
	Millions of yen
	Three months ended September 30
	2016			2017
Service cost	¥	2,098		¥	2,393
Interest cost		361			564
Expected return on plan assets		(1,501	)		(1,517	)
Amortization of net actuarial losses		712			1,001
Amortization of prior service cost		(287	)		(265	)
Net periodic benefit cost	¥	1,383		¥	2,176

Nomura also recognized net periodic benefit cost of plans other than Japanese entities’ plans, which are not significant.