Deferred compensation plans (Tables)

12 Months Ended

Mar. 31, 2017

Deferred compensation plans

SAR Plan A awards, Weighted-average assumptions

	Year ended March 31
	2015			2016			2017
Expected volatility		45.26	%		40.87	%		40.95	%
Expected dividends yield		2.39	%		2.99	%		2.30	%
Expected lives (in years)		7			7			4.5
Risk-free interest rate		0.43	%		0.27	%		0.03	%

Activity relating to SAR Plan A awards

	Outstanding (number of  Nomura shares)			Weighted-average exercise price		Weighted-average remaining life until expiry (years)
Outstanding as of March 31, 2016		14,991,100		¥	640		3.6
Granted		2,561,000			593
Exercised		(975,400	)		370
Forfeited		(55,200	)		707
Expired		(2,050,500	)		728
Outstanding as of March 31, 2017		14,471,000		¥	634		4.2
Exercisable as of March 31, 2017		9,340,600		¥	599		3.1

Activity relating to SAR Plan B awards

	Outstanding (number of  Nomura shares)			Weighted-average grant date fair value per share		Weighted-average remaining life until expiry (years)
Outstanding as of March 31, 2016		91,976,200		¥	545		5.1
Granted		23,870,500			375
Exercised		(39,702,000	)		554
Forfeited		(1,794,400	)		514
Expired		(18,700	)		816
Outstanding as of March 31, 2017		74,331,600		¥	486		4.8
Exercisable as of March 31, 2017		20,666,000		¥	512		3.1

Activity related to NSUs and CSUs

	NSUs						CSUs
	Outstanding (number of  units)			Stock price			Outstanding (number of  units)			Stock price
Outstanding as of March 31, 2016		38,582,022		¥	498			29,510,658		¥	586
Granted		21,048,181			463	(1)		19,275,538			475	(1)
Vested		(26,622,239	)		536	(2)		(28,894,163	)		526	(2)
Forfeited		(1,035,157	)					(859,970	)
Outstanding as of March 31, 2017		31,972,807		¥	679	(3)		19,032,063		¥	603	(3)

(1) Weighted-average price of the Company’s common stock used to determine number of awards granted.

(2) Weighted-average price of the Company’s common stock used to determine the final cash settlement amount of the awards.

(3) The price of the Company’s common stock used to remeasure the fair value of the remaining outstanding unvested awards as of March 31, 2017.

Activity relating to NIUs

	Outstanding (number of  units)			Index  price(1)
Outstanding as of March 31, 2016		22,916,989		$	4,439
Granted		11,034,113			4,583	(2)
Vested		(20,822,917	)		4,789	(3)
Forfeited		(846,847	)
Outstanding as of March 31, 2017		12,281,338		$	5,123	(4)

(1) The price of each unit is determined using 1/1000th of the index price.

(2) Weighted-average index price used to determine number of awards granted.

(3) Weighted-average index price used to determine the final cash settlement amount of the awards.

(4) Index price used to remeasure the total fair value of the remaining outstanding unvested awards as of March 31, 2017.