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Long-Duration Insurance Contracts Relating to Life Insurance Operations (Tables)

12 Months Ended

Mar. 31, 2025

Liability for Future Policy Benefit, Activity [Line Items]

Schedule of Reconciliation of Liability For Future Policy Benefits

The following tables present balances of and changes in the liability for future policy benefits as of and for the fiscal year ended March 31, 2024 and 2025.

		Millions of yen
		March 31, 2024												March 31, 2025
Present value of expected net premiums		Yen-denominated insurance (First Sector)				Yen-denominated insurance (Third Sector)				Foreign currency denominated insurance				Yen-denominated insurance (First Sector)				Yen-denominated insurance (Third Sector)				Foreign currency denominated insurance
Beginning balance		¥	894,537			¥	1,389,063			¥	374,951			¥	873,038			¥	1,306,719			¥	389,664
Beginning balance at original discount rate			865,333				1,338,398				409,847				858,959				1,289,145				424,186
Effect of changes in cash flow assumptions			(6,213	)			3,634				2,106				(9,660	)			(7,648	)			66
Effect of actual variances from expected experience			1,418				2,865				(2,531	)			984				812				(3,193	)
Adjusted beginning balance			860,538				1,344,897				409,422				850,283				1,282,309				421,059
Issuances			94,169				52,510				43,378				130,605				34,189				31,717
Interests			10,840				18,439				12,405				10,568				17,489				12,323
Net premium earned			(106,300	)			(119,416	)			(61,594	)			(116,850	)			(116,049	)			(62,788	)
Actual variances from cash flow assumptions			(550	)			(862	)			(1,222	)			(437	)			(770	)			(1,231	)
Derecognition			262				(6,423	)			(32,681	)			3,131				(463	)			(27,567	)
Effect of changes in foreign exchange rate			0				0				54,478				0				0				(4,667	)
Ending balance at original discount rate			858,959				1,289,145				424,186				877,300				1,216,705				368,846
Effect of changes in discount rates			14,079				17,574				(34,522	)			(21,869	)			(54,491	)			(22,914	)
Ending balance		¥	873,038			¥	1,306,719			¥	389,664			¥	855,431			¥	1,162,214			¥	345,932

		Millions of yen
		2024												2025
Present value of expected future policy benefits		Yen-denominated insurance (First Sector)				Yen-denominated insurance (Third Sector)				Foreign currency denominated insurance				Yen-denominated insurance (First Sector)				Yen-denominated insurance (Third Sector)				Foreign currency denominated insurance
Beginning balance		¥	1,571,886			¥	1,918,462			¥	387,073			¥	1,565,877			¥	1,844,599			¥	447,081
Beginning balance at original discount rate			1,598,009				1,887,744				573,616				1,658,143				1,895,730				659,217
Effect of changes in cash flow assumptions			(7,962	)			4,600				1,782				(10,284	)			(8,470	)			81
Adjusted beginning balance			1,590,047				1,892,344				575,398				1,647,859				1,887,260				659,298
Issuances			94,169				52,510				43,378				130,605				34,189				31,717
Interests			23,981				28,159				17,649				24,463				27,997				19,385
Insurance claims paid			(52,161	)			(70,513	)			(17,757	)			(57,099	)			(72,044	)			(18,634	)
Actual variances from cash flow assumptions			(11,644	)			(7,465	)			11,794				(9,571	)			(8,287	)			13,086
Derecognition			13,751				695				(49,973	)			14,655				8,960				(46,693	)
Effect of changes in foreign exchange rate			0				0				78,728				0				0				(8,154	)
Ending balance at original discount rate			1,658,143				1,895,730				659,217				1,750,912				1,878,075				650,005
Effect of changes in discount rates			(92,266	)			(51,131	)			(212,136	)			(239,476	)			(218,115	)			(207,066	)
Ending balance		¥	1,565,877			¥	1,844,599			¥	447,081			¥	1,511,436			¥	1,659,960			¥	442,939
Net liability for future policy benefits		¥	692,839			¥	537,880			¥	57,417			¥	656,005			¥	497,746			¥	97,007
Deferred profit liabilities			47,068				68,539				26,930				61,448				74,962				37,340
Subtotal			739,907				606,419				84,347				717,453				572,708				134,347
Less: Reinsurance recoverable			211				0				0				196				0				0
The liability for future policy benefits, after reinsurance recoverable		¥	739,696			¥	606,419			¥	84,347			¥	717,257			¥	572,708			¥	134,347

Schedule of Policy Liabilities And Policy Account Balances In Statement of Financial Position

The following tables provide the breakdown of the policy liabilities and policy account balances recorded in the consolidated balance sheets as of March 31, 2024 and 2025:

		Millions of yen
		2024				2025
Yen-denominated insurance (First Sector)		¥	739,696			¥	717,257
Yen-denominated insurance (Third Sector)			606,419				572,708
Foreign currency denominated insurance			84,347				134,347
Subtotal			1,430,462				1,424,312
Policy account balances for single-payment whole life insurance			0				134,572
Fixed annuities and annuitization benefits			138,419				119,093
Policy account balances for variable annuity and variable life insurance contracts and market risk benefits			167,207				136,257
Others*			156,422				133,813
Total		¥	1,892,510			¥	1,948,047

* Others include unearned premiums and liabilities for unpaid claims.

Schedule of Liability For Future Policy Benefit Expected Future Policy Benefit Undiscounted Before Reinsurance

The amount of undiscounted and discounted expected future gross premiums and expected future policy benefits and expenses as of March 31, 2024 and 2025 are as follows:

		Millions of yen
		2024								2025
		Undiscounted				Discounted				Undiscounted				Discounted
Yen-denominated insurance (First Sector)
Expected future gross premiums		¥	1,525,071			¥	1,395,370			¥	1,551,749			¥	1,362,111
Expected future policy benefits and expenses			2,378,836				1,565,877				2,532,638				1,511,436
Yen-denominated insurance (Third Sector)
Expected future gross premiums			2,590,963				2,242,701				2,456,942				2,003,392
Expected future policy benefits and expenses			2,583,535				1,844,599				2,552,133				1,659,960
Foreign currency denominated insurance
Expected future gross premiums			685,134				535,943				617,771				493,328
Expected future policy benefits and expenses			1,300,018				447,081				1,288,727				442,939

Schedule of Liability For Future Policy Benefit Gross Premiums And Interest Expense

The amounts of gross premiums and interest expense recognized in the consolidated statement of income for the fiscal year ended March 31, 2023, 2024 and 2025 are as follows:

		Millions of yen
		Fiscal Year ended March 31, 2023								Fiscal Year ended March 31, 2024								Fiscal Year ended March 31, 2025
		Gross premiums				Interest expense				Gross premiums				Interest expense				Gross premiums				Interest expense
Yen-denominated insurance (First Sector)		¥	162,667			¥	12,309			¥	168,805			¥	13,142			¥	184,650			¥	13,895
Yen-denominated insurance (Third Sector)			208,640				9,077				205,787				9,720				199,809				10,509
Foreign currency denominated insurance			77,369				3,585				82,332				5,243				87,400				7,062
Total		¥	448,676			¥	24,971			¥	456,924			¥	28,105			¥	471,859			¥	31,466

Schedule of Liability For Future Policy Benefit, Weighted Average Discount Rates

The weighted average discount rates for the liability for future policy benefits as of March 31, 2024 and 2025 are as follows:

		Weighted average rate
		2024				2025
Yen-denominated insurance (First Sector)
Weighted average of the original discount rates			1.7	%			1.8	%
Weighted average of the current discount rates			2.1				2.7
Yen-denominated insurance (Third Sector)
Weighted average of the original discount rates			1.7				1.7
Weighted average of the current discount rates			2.1				2.7
Foreign currency denominated insurance
Weighted average of the original discount rates			3.1				3.3
Weighted average of the current discount rates			5.5				5.9

Schedule of Liability For Future Policy Benefit, Weighted Average Duration

The weighted average duration of the liability for future policy benefit as of March 31, 2024 and 2025 are as follows:

		Years
		2024				2025
Yen-denominated insurance (First Sector)			36.4				35.1
Yen-denominated insurance (Third Sector)			34.7				32.5
Foreign currency denominated insurance			36.9				33.5

Schedule of Deferred Policy Acquisition Costs

The following tables present balances of and changes in the deferred policy acquisition costs as of and for the fiscal year ended March 31, 2024 and 2025:

		Millions of yen
		2024
		Yen-denominated insurance (First Sector)				Yen-denominated insurance (Third Sector)				Foreign currency denominated insurance				Total
Beginning balance		¥	77,957			¥	166,696			¥	42,726			¥	287,379
Capitalization			10,285				12,855				7,120				30,260
Amortization			(5,901	)			(9,970	)			(2,301	)			(18,172	)
Effect of changes in foreign exchange rate			0				0				6,267				6,267
Ending balance		¥	82,341			¥	169,581			¥	53,812			¥	305,734

		Millions of yen
		2025
		Yen-denominated insurance (First Sector)				Yen-denominated insurance (Third Sector)				Foreign currency denominated insurance				Single- payment whole life insurance				Total
Beginning balance		¥	82,341			¥	169,581			¥	53,812			¥	0			¥	305,734
Capitalization			13,431				9,180				6,633				6,627				35,871
Amortization			(6,411	)			(10,072	)			(2,689	)			(43	)			(19,215	)
Effect of changes in foreign exchange rate			0				0				(605	)			(137	)			(742	)
Others*			0				0				0				(5,808	)			(5,808	)
Ending balance		¥	89,361			¥	168,689			¥	57,151			¥	639			¥	315,840

* Others include adjustments of reinsurance.

Schedule of Minimum Guaranteed Interest Rates

The following table presents policy account balances for single-payment whole life insurance and fixed annuity and annuitization benefits by range of minimum guaranteed interest rates as of March 31, 2024 and 2025.

		$				$				$				$
		Millions of yen
		2024				2025
Range of minimum guaranteed interest rates		Minimum guarantees				Minimum guarantees				Above minimum guarantees
										50-150bp				150bp or more
0.00% - less than 1.50%		¥	131,328			¥	111,626			¥	7,421			¥	127,151
1.50% or more			7,091				7,467				0				0
Total		¥	138,419			¥	119,093			¥	7,421			¥	127,151

Schedule of Policy Account Balance And Market Risk Benefits

The following table provides information about policy account balances for variable annuity and variable life insurance contracts and market risk benefits as of and for the fiscal year ended March 31, 2024 and 2025:

		Millions of yen
		2024				2025
Beginning balance		¥	163,734			¥	167,207
Effect of changes other than through net income and other comprehensive income			(26,997	)			(23,706	)
Surrenders and withdrawals			(7,641	)			(4,924	)
Transfer in			(7,891	)			(6,902	)
Benefit payments			(11,434	)			(11,851	)
Others			(31	)			(29	)
Changes through net income			30,205				(7,292	)
Effect of changes in fair value of corresponding investment assets			40,846				(3,538	)
Fee income			(3,750	)			(3,590	)
Effect of changes in fair value of market risk benefits			(6,891	)			(164	)
Changes through other comprehensive income			265				48
Effect of changes in the instrument-specific credit risk			265				48
Ending balance		¥	167,207			¥	136,257
		Millions of yen
		2024				2025
Policy account balances		¥	167,496			¥	136,662
Market risk benefits			(289	)			(405	)
Total		¥	167,207			¥	136,257

Whole Life Insurance [Member]

Liability for Future Policy Benefit, Activity [Line Items]

Schedule of Balances of Policy Account

The following table provides information about single-payment whole life insurance for the fiscal year ended March 31, 2025.

		Millions of yen
		2025
Beginning balance		¥	0
New contract			136,863
Surrenders and partial surrenders			(66	)
Benefit payments and lump sum payments, etc.			(49	)
Policy charges			(188	)
Interests			1,072
Effect of changes in foreign exchange rate			(3,060	)
Ending balance		¥	134,572
		2025
Weighted average guaranteed interest rate (%)			3.9	%
Benefits in excess of policy account balances (Millions of yen)			0
Cash surrender value (Millions of yen)			127,659

Fixed Annuity And Annuitization Benefits [Member]

Liability for Future Policy Benefit, Activity [Line Items]

Schedule of Balances of Policy Account

The following table provides information about fixed annuity and annuitization benefits for the fiscal year ended March 31, 2024 and 2025.

		$				$
		Millions of yen
		2024				2025
Beginning balance		¥	158,952			¥	138,419
Transfer in			10,249				9,381
Surrenders and partial surrenders			(71	)			(85	)
Benefit payments and lump sum payments, etc.			(31,179	)			(28,912	)
Policy charges			(229	)			(214	)
Transfer out			(290	)			(373	)
Interests			1,023				895
Others			(36	)			(18	)
Ending balance		¥	138,419			¥	119,093

		$				$
		2024				2025
Weighted average guaranteed interest rate (%)			0.7				0.7
Benefits in excess of policy account balances (Millions of yen)		¥	1			¥	0
Cash surrender value (Millions of yen)			132,411				113,492

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