Commitments, contingencies and guarantees (Tables)

6 Months Ended

Sep. 30, 2025

Commitments, Contingencies and Guarantees [Abstract]

Commitments outstanding

The following table presents a summary of the key types of outstanding commitments provided by Nomura.

	Millions of yen
	March 31, 2025		September 30, 2025
Commitments to extend credit
Liquidity facilities to central clearing counterparties	¥	2,038,836	¥	2,821,557
Other commitments to extend credit		1,199,287		1,561,556
Total	¥	3,238,123	¥	4,383,113
Commitments to invest	¥	25,677	¥	257,665

Maturity schedule of commitments

As of September 30, 2025, these commitments had the following maturities:

	Millions of yen
			Years to Maturity
	Total contractual amount		Less than 1 year		1 to 3 years		3 to 5 years		More than 5 years
Commitments to extend credit
Liquidity facilities to central clearing counterparties	¥	2,821,557	¥	2,821,557	¥	—	¥	—	¥	—
Other commitments to extend credit		1,561,556		452,063		536,091		331,482		241,920
Total	¥	4,383,113	¥	3,273,620	¥	536,091	¥	331,482	¥	241,920
Commitments to invest	¥	257,665	¥	237,323	¥	3,980	¥	4,069	¥	12,293

Information on derivative contracts and standby letters of credit and other guarantees

The following table presents information on Nomura’s derivative contracts that could meet the accounting definition of a guarantee and standby letters of credit and other guarantees.

	Millions of yen
	March 31, 2025				September 30, 2025
	Carrying value		Maximum Potential Payout/ Notional Total		Carrying value		Maximum Potential Payout/ Notional Total
Derivative contracts(1)(2)	¥	9,399,725	¥	609,318,612	¥	9,848,160	¥	617,917,871
Standby letters of credit and other guarantees(3)		—		4,939,056		10		4,287,086

(1) Credit derivatives are disclosed in Note 3 “Derivative instruments and hedging activities” and are excluded from above.

(2) Derivative contracts primarily consist of equity, interest rate and foreign exchange contracts.

(3) Primarily related to a certain sponsored repo program where Nomura guarantees to a third party clearing house in relation to its clients’ payment obligations. Our credit exposures under this guarantee are minimized by obtaining collateral from clients at amount approximately the maximum potential payout under the guarantee.

Maturity information on derivative contracts and standby letters of credit and other guarantees

The following table presents maturity information on Nomura’s derivative contracts that could meet the accounting definition of a guarantee and standby letters of credit and other guarantees as of September 30, 2025.

	Millions of yen
	Carrying value		Maximum Potential Payout/Notional
			Total		Years to Maturity
					Less than 1 year		1 to 3 years		3 to 5 years		More than 5 years
Derivative contracts	¥	9,848,160	¥	617,917,871	¥	179,495,442	¥	188,872,112	¥	56,037,226	¥	193,513,091
Standby letters of credit and other guarantees		10		4,287,086		4,247,087		28,971		8,120		2,908