Financing receivables (Tables)

12 Months Ended

Mar. 31, 2021

Financing Receivables [Abstract]

Summary of loans receivable reported within loans receivable or investments in and advances to affiliated companies

	Millions of yen
	March 31, 2020
	Carried at amortized cost		Carried at fair value(1)		Total
Loans receivable
Loans at banks	¥	521,715	¥	—	¥	521,715
Short-term secured margin loans		296,833		8,905		305,738
Inter-bank money market loans		865		—		865
Corporate loans		1,232,851		796,236		2,029,087
Total loans receivable	¥	2,052,264	¥	805,141	¥	2,857,405

	Millions of yen
	March 31, 2021
	Carried at amortized cost		Carried at fair value(1)		Total
Loans receivable
Loans at banks	¥	605,200	¥	—	¥	605,200
Short-term secured margin loans		436,221		—		436,221
Inter-bank money market loans		1,289		—		1,289
Corporate loans		1,082,239		818,523		1,900,762
Total loans receivable	¥	2,124,949	¥	818,523	¥	2,943,472
Advances to affiliated companies		1,000		—		1,000
Total	¥	2,125,949	¥	818,523	¥	2,944,472

(1) Includes loans receivable and loan commitments carried at fair value through election of the fair value option.

Changes in allowance for doubtful accounts

	Millions of yen
	Year ended March 31, 2019
	Allowance for doubtful accounts												Allowance for receivables other than loans			Total allowance for doubtful accounts
	Loans at banks			Short-term secured margin loans			Corporate loans			Subtotal
Opening balance	¥	1,140		¥	—		¥	417		¥	1,557		¥	1,957		¥	3,514
Provision for credit losses		7			364			434			805			30			835
Charge-offs		(95	)		—			(0	)		(95	)		(102	)		(197	)
Other(1)		—			6			17			23			(6	)		17
Ending balance	¥	1,052		¥	370		¥	868		¥	2,290		¥	1,879		¥	4,169
	Millions of yen
	Year ended March 31, 2020
	Allowance for doubtful accounts												Allowance for receivables other than loans			Total allowance for doubtful accounts
	Loans at banks			Short-term secured margin loans			Corporate loans			Subtotal
Opening balance	¥	1,052		¥	370		¥	868		¥	2,290		¥	1,879		¥	4,169
Provision for credit losses		512			—			7,125			7,637			1,451			9,088
Charge-offs		—			—			—			—			(162	)		(162	)
Other(1)		—			(18	)		(49	)		(67	)		(16	)		(83	)
Ending balance	¥	1,564		¥	352		¥	7,944		¥	9,860		¥	3,152		¥	13,012

(1) Includes the effect of foreign exchange movements.

	Millions of yen
	Year ended March 31, 2021
	Allowance for doubtful accounts												Allowance against receivables other than loans(2)			Total allowance for doubtful accounts
	Loans at banks			Short-term secured margin loans			Corporate loans			Subtotal
Opening balance prior to CECL adoption	¥	1,564		¥	352		¥	7,944		¥	9,860		¥	3,152		¥	13,012
Impact of CECL adoption(1)		232			—			1,738			1,970			2			1,972
Opening balance after CECL adoption		1,796			352			9,682			11,830			3,154			14,984
Provision for credit losses(3)		(196	)		—			38,211			38,015			1,060			39,075
Charge-offs		(318	)		(363	)		(0	)		(681	)		(1,600	)		(2,281	)
Other(4)		—			11			92			103			1,903			2,006
Ending balance	¥	1,282		¥	—		¥	47,985		¥	49,267		¥	4,517		¥	53,784

(1) The balance recognized on April 1, 2020 on adoption of the CECL impairment model under ASC 326.

(2) Includes collateralized agreements, customer contract assets and receivables and other receivables.

(3) In March 2021, following the default by the U.S. client an additional allowance for doubtful accounts of ¥41,561 million was taken on the loans with the client. See Note 23. “U.S. Prime Brokerage Event” for further information on this event. 

(4) Includes the effect of foreign exchange movements and recoveries collected.

Analysis of each class of loans not carried at fair value using internal ratings or equivalent credit quality indicators

	Millions of yen
	March 31, 2021
	2021		2020		2019			2018			2017			2016 or earlier		Revolving		Total
Secured loans at banks:
AAA-BBB	¥	54,179	¥	115,003	¥	17,106		¥	12,450		¥	4,240		¥	17,634	¥	—	¥	220,612
BB-CCC		75,680		115,131		3,864			2,324			—			5,484		—		202,483
CC-D		—		—		—			—			—			—		—		—
Others(1)		—		61,185		—			—			—			—		—		61,185
Total secured loans at banks	¥	129,859	¥	291,319	¥	20,970		¥	14,774		¥	4,240		¥	23,118	¥	—	¥	484,280
Unsecured loans at banks:
AAA-BBB	¥	9,101	¥	22,955	¥	27,863		¥	17,563		¥	8,484		¥	34,719	¥	—	¥	120,685
BB-CCC		—		—		235			—			—			—		—		235
CC-D		—		—		—			—			—			—		—		—
Others(1)		—		—		—			—			—			—		—		—
Total unsecured loans at banks	¥	9,101	¥	22,955	¥	28,098		¥	17,563		¥	8,484		¥	34,719	¥	—	¥	120,920
Short-term secured margin loans:
AAA-BBB	¥	—	¥	—	¥	—		¥	—		¥	—		¥	—	¥	—	¥	—
BB-CCC		—		—		—			—			—			—		—		—
CC-D		—		—		—			—			—			—		—		—
Others(1)		170,514		141		—			—			—			—		265,566		436,221
Total short-term secured margin loans	¥	170,514	¥	141	¥	—		¥	—		¥	—		¥	—	¥	265,566	¥	436,221
Unsecured inter-bank money market loans:
AAA-BBB	¥	1,289	¥	—	¥	—		¥	—		¥	—		¥	—	¥	—	¥	1,289
BB-CCC		—		—		—			—			—			—		—		—
CC-D		—		—		—			—			—			—		—		—
Others(1)		—		—		—			—			—			—		—		—
Total unsecured inter-bank money market loans	¥	1,289	¥	—	¥	—		¥	—		¥	—		¥	—	¥	—	¥	1,289
Secured corporate loans:
AAA-BBB	¥	33,965	¥	261,182	¥	45,880		¥	9,817		¥	6,406		¥	27,672	¥	97	¥	385,019
BB-CCC		20,093		102,941		34,435			29,869			13,067			17,573		173,178		391,156
CC-D(2)		197,859		—		—			—			—			—		—		197,859
Others(1)		—		39		40			11			30			4,697		428		5,245
Total secured corporate loans	¥	251,917	¥	364,162	¥	80,355		¥	39,697		¥	19,503		¥	49,942	¥	173,703	¥	979,279
Unsecured corporate loans:
AAA-BBB	¥	—	¥	—	¥	—		¥	—		¥	—		¥	—	¥	—	¥	—
BB-CCC		84		—		450			—			—			—		—		534
CC-D		—		—		—			—			—			—		—		—
Others(1)		1		191		8			97,212			—			5,014		—		102,426
Total unsecured corporate loans	¥	85	¥	191	¥	458		¥	97,212		¥	—		¥	5,014	¥	—	¥	102,960
Advances to affiliated companies
AAA-BBB	¥	1,000	¥	—	¥	—	¥		—	¥		—	¥		—	¥	—	¥	1,000
BB-CCC		—		—		—			—			—			—		—		—
CC-D		—		—		—			—			—			—		—		—
Others(1)		—		—		—			—			—			—		—		—
Total advances to affiliated companies	¥	1,000	¥	—	¥	—	¥		—	¥		—	¥		—	¥	—	¥	1,000
Total	¥	563,765	¥	678,768	¥	129,881		¥	169,246		¥	32,227		¥	112,793	¥	439,269	¥	2,125,949

(1) Relate to collateralized exposures where a specified ratio of LTV is maintained.

(2) Includes loans of ¥197,859 million in relation to the U.S. prime brokerage event.