Employee benefits (Tables)

12 Months Ended

Mar. 31, 2025

Text block 1 [Abstract]

Disclosure of Defined Benefit Plans

The changes in present value of defined benefit obligations and fair value of plan assets are as follows:


		Yen in millions
		For the years ended March 31,
		2024								2025
		Japanese plans				Foreign plans				Japanese plans				Foreign plans

Present value of defined benefit obligations:
Benefit obligations at beginning of year			1,964,655				1,423,263				1,898,339				1,651,016
Current service cost			80,133				45,581				76,758				49,225
Interest cost			21,666				73,014				26,290				81,411
Remeasurements:
Changes in demographic assumptions			850				1,337				(3,635	)			68
Changes in financial assumptions			(74,816	)			(16,818	)			(181,128	)			(48,712	)
Other			(2,926	)			2,222				(385	)			(15,579	)
Past service cost			418				(18	)			(184	)			(3,027	)
Plan participants’ contributions			1,143				3,835				1,065				4,355
Benefits paid			(90,283	)			(64,789	)			(86,871	)			(76,204	)
Effect of changes in exchange rates and other			(2,501	)			183,389				(696	)			(20,499	)

Benefit obligations at end of year			1,898,339				1,651,016				1,729,554				1,622,053

Fair value of plan assets:
Plan assets at beginning of year			1,840,586				1,109,394				2,128,476				1,284,918
Interest income			21,377				73,033				29,462				57,149
Remeasurement
Actual return on plan assets, excluding interest income			266,101				(30,407	)			(66,135	)			(33,874	)
Employer contributions			47,459				18,252				35,669				19,016
Plan participants’ contributions			1,143				3,835				1,065				4,355
Benefits paid			(47,610	)			(34,845	)			(47,528	)			(42,023	)
Effect of changes in exchange rates and other			(579	)			145,656				—				(18,305	)

Plan assets at end of year			2,128,476				1,284,918				2,081,009				1,271,236

The impact of minimum funding requirement and asset ceiling			268,228				—				572,107				—

Net defined benefit liability (asset)			38,092				366,098				220,652				350,817

Disclosure of Funded Defined Benefit Obligation and Unfunded Defined Benefit Obligation

The funded defined benefit obligations and the unfunded defined benefit obligations are as follows:


		Yen in millions
		March 31,
		2024								2025
		Japanese plans				Foreign plans				Japanese plans				Foreign plans

Funded defined benefit obligations			1,415,507				1,250,773				1,265,948				1,225,195
Plan assets			(2,128,476	)			(1,284,918	)			(2,081,009	)			(1,271,236	)
The impact of minimum funding requirement and asset ceiling			268,228				—				572,107				—

Subtotal			(444,741	)			(34,145	)			(242,954	)			(46,040	)

Unfunded defined benefit obligations			482,833				400,243				463,606				396,857

Total			38,092				366,098				220,652				350,817

Disclosure of Amounts Recognized in the Consolidated Statement of Financial Position are Comprised

The net defined benefit liability (asset) recognized in the consolidated statement of financial position are comprised of the following:


		Yen in millions
		March 31,
		2024								2025
		Japanese plans				Foreign plans				Japanese plans				Foreign plans

Retirement benefit liabilities			597,641				480,320				562,375				457,193
Other non-current assets (Retirement benefit assets)			(559,550	)			(114,222	)			(341,723	)			(106,376	)

Net amount recognized			38,092				366,098				220,652				350,817

Disclosure of Assumptions Used Defined Benefit Provident Fund Plan

The weighted-average discount rates used to determine the present value of defined benefit obligations are as follows:


		March 31,
		2024								2025
		Japanese plans				Foreign plans				Japanese plans				Foreign plans

Discount rate			1.4	%			5.2	%			2.2	%			5.4	%

Disclosure of fair value of planned asset

The following table summarizes the fair value of classes of plan assets.


		Yen in millions
		March 31, 2024
		Japanese plans												Foreign plans
		Quoted prices in active markets								Total				Quoted prices in active markets								Total
		Available				Not available				Total				Available				Not available				Total
Stocks			604,210				—				604,210				151,669				—				151,669
Government bonds			135,912				3				135,915				278,982				—				278,982
Bonds (other)			—				92,568				92,568				—				271,917				271,917
Commingled funds			—				521,388				521,388				—				399,742				399,742
Insurance contracts			—				236,216				236,216				—				—				—
Other			288,891				249,288				538,180				17,899				164,708				182,607

Total			1,029,013				1,099,463				2,128,476				448,550				836,367				1,284,918


		Yen in millions
		March 31, 2025
		Japanese plans												Foreign plans
		Quoted prices in active markets								Total				Quoted prices in active markets								Total
		Available				Not available				Total				Available				Not available				Total
Stocks . . . . . . . . . . . . . . . . . . . . . .			375,443				—				375,443				128,908				—				128,908
Government bonds . . . . . . . . . . . .			239,849				—				239,849				301,955				—				301,955
Bonds (other) . . . . . . . . . . . . . . . .			2,177				77,768				79,944				—				246,851				246,851
Commingled funds . . . . . . . . . . . .			—				500,917				500,917				—				398,380				398,380
Insurance contracts . . . . . . . . . . . .			—				224,694				224,694				—				—				—
Other . . . . . . . . . . . . . . . . . . . . . . .			400,852				259,310				660,162				44,066				151,076				195,142

Total . . . . . . . . . . . . . . . . . . .			1,018,321				1,062,688				2,081,009				474,929				796,306				1,271,236

Disclosure of Impact of Minimum Funding Requirement and Asset Ceiling

The impact of minimum funding requirement and asset ceiling is as follows:


		Yen in millions
		For the years ended March 31,
		2024								2025
		Japanese plans				Foreign plans				Japanese plans				Foreign plans
Beginning balance of the fiscal year			—				—				268,228				—
Interest income			—				—				4,694				—
Remeasurements:
Change in asset ceiling excluding interest income			268,228				—				299,185				—
Translation adjustments			—				—				—				—

Ending balance of the fiscal year			268,228				—				572,107				—

Disclosure of Sensitivity Analysis For Actuarial Assumptions Benefit Obligations

The following table illustrates the effects on defined benefit obligations of the change in weighted-average discount rates, assuming all other assumptions are consistent.


		Yen in millions
		March 31,
		2024								2025
		Japanese plans				Foreign plans				Japanese plans				Foreign plans
0.5% decrease			144,307				119,443				119,138				113,268
0.5% increase			(118,737	)			(113,734	)			(103,296	)			(110,060	)

Disclosure of Information About Maturity Profile of Defined Benefit Obligation

The weighted average duration of defined benefit obligations are as follows:

March 31,

2024

2025

Japanese plans

Foreign plans

Japanese plans

Foreign plans

Weighted average duration of defined benefit obligations

17.1years

13.7years

16.9years

13.1years