Commitments and contingencies (Tables)

12 Months Ended

Mar. 31, 2020

Summary of Maximum Potential Amount of Future Payments under Guarantees

The MHFG Group, when necessary, requires collateral such as cash, investment securities and real estate or third-party guarantees depending on the amount of credit risk involved, and employs means such as sub-participation to reduce the credit risk associated with guarantees. The maximum exposure or notional amount below does not represent the expected losses from the execution of the guarantees.

2019	Maximum potential/Contractual or Notional amount		Amount by expiration period
			One year or less		After one year through five years		After five years
	(in billions of yen)
Performance guarantees		2,307		1,265		878		164
Guarantees on loans		289		164		46		79
Guarantees on securities		145		91		54		—
Other guarantees		2,324		1,447		834		43
Guarantees for the repayment of trust principal		65		—		47		18
Liabilities of trust accounts		362		61		148		153
Derivative financial instruments		14,170		5,807		6,434		1,929

2020	Maximum potential/Contractual or Notional amount		Amount by expiration period
			One year or less		After one year through five years		After five years
	(in billions of yen)
Performance guarantees		2,456		1,511		735		210
Guarantees on loans		301		204		34		63
Guarantees on securities		110		22		88		—
Other guarantees		2,314		1,925		319		70
Guarantees for the repayment of trust principal		59		—		42		17
Liabilities of trust accounts		446		80		201		165
Derivative financial instruments		21,756		11,045		7,951		2,760

Summary of Contractual Amounts with Regard to Undrawn Commitments

The table below summarizes the contractual amounts with regard to these undrawn commitments at March 31, 2019 and 2020:

	2019		2020
	(in billions of yen)
Commitments to extend credit(Note)		76,857		76,633
Commercial letters of credit		778		690
Total		77,635		77,323

Note: Commitments to extend credit include commitments to invest in securities.

Schedule of Balance Sheet Information Related to operating lease

The following table presents the consolidated balance sheet information related to operating leases as of March 31, 2020:

	As of March 31, 2020
	(in millions of yen, except for remaining lease term and discount rate)
ROU assets(Note)		613,068
Lease liabilities(Note)		627,250
Weighted average:
Remaining lease term		15.7	years
Discount rate		0.55	%

Note: ROU assets and lease liabilities are included in Other assets and Other liabilities, respectively, on the consolidated balance sheets.

Schedule of operating lease cost and supplemental cash flow information

The following table presents lease cost and supplemental information related to operating leases for the fiscal year ended March 31, 2020:

	Fiscal year ended March 31, 2020
	(in millions of yen)
Lease cost(Note)		126,840
ROU assets obtained in exchange for new lease liabilities		60,047
Operating cash flows		102,066

Note: Lease cost for operating leases are included in Occupancy expenses on the consolidated statements of income. The Group’s variable lease costs and costs for leases with terms of twelve months or less are not significant. Total rental expense for the fiscal years ended March 31, 2018 and 2019 prior to the adoption of ASU No.2016-02 was ¥117,270 million and ¥115,239 million, respectively.

Future Minimum Lease Payments for Capitalized Leases and Rental Payments for Operating Leases

The following table shows future lease payments under operating leases as of March 31, 2020:

	As of March 31, 2020
	(in millions of yen)
Fiscal year ending March 31:
2021		93,997
2022		68,268
2023		54,377
2024		47,608
2025		41,539
2026 and thereafter		346,741
Total lease payments		652,530
Amount representing interest		25,280
Total lease liabilities for operating leases		627,250

Performance guarantees, Guarantees on loans, Guarantees on securities and Other guarantees

Summary of Maximum Potential Amount of Future Payments under Guarantees

The table below presents the maximum potential amount of future payments of performance guarantees, guarantees on loans, guarantees on securities and other guarantees classified based on internal ratings at March 31, 2019 and 2020:

	2019		2020
	(in billions of yen)
Investment grade		4,124		4,233
Non-investment grade		941		948
Total		5,065		5,181