Required ratio of capital conservation buffer in addition to Common Equity Tier 1 Capital ratio.

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- Definition

Minimum capital ratio which is required for financial instruments firms to maintain by Financial Instruments and Exchange Act and related ordinance.

+ References

No definition available.

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- Definition

Minimum capital ratio requirement for financial instrument firms which may lead to a suspension of all or part of the business for a period of time and cancellation of a registration.

+ References

No definition available.

+ Details

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- Definition

Minimum capital ratio requirement for financial instruments firms which will call for regulatory reporting.

+ References

No definition available.

+ Details

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- Definition

The minimum Common Equity Tier 1 Capital Ratio (Common Equity Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

No definition available.

+ Details

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- Definition

Maximum required ratio of countercyclical buffer in addition to Common Equity Tier 1 Capital ratio that would be imposed by regulators at their discretion if it is determined that a period of excessive credit growth is contributing to an increase in financial institution systemic risk.

+ References

No definition available.

+ Details

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- Definition

Global systemically important bank leverage ratio buffer to G-SIB capital surcharge, effective on January 1, 2022.

+ References

No definition available.

+ Details

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- Definition

Required ratio of Global Systemically Important Bank ("G-SIB") surcharge in addition to Common Equity Tier 1 Capital ratio.

+ References

No definition available.

+ Details

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- Definition

Increase To Global Systemically Important Bank Leverage Ratio Buffer To Gsib Capital Surcharge

+ References

No definition available.

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- Definition

Number Of Approaches

+ References

No definition available.

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- Definition

Number Of Methodologies Or Guidelines

+ References

No definition available.

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- Definition

Number Of Primary Regulatory Capital Ratios

+ References

No definition available.

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- Definition

Disclosure of percentage of capital accounts to the total amounts equivalent to market, counterparty credit and operational risks.

+ References

No definition available.

+ Details

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- Definition

Amount of net capital of broker-dealer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Rule 15c3-1
-Number 240
-Section 15c3-1
-Publisher SEC

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B

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-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1

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- Definition

Ratio of minimum Tier 1 leverage capital to average assets required for capital adequacy as defined by regulatory framework.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1

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-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B

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Regulatory Capital Requirements (Narrative) (Detail) ¥ in Millions	Apr. 01, 2024	Mar. 31, 2026 JPY (¥) guideline capitalRatio Approach	Mar. 31, 2025 JPY (¥)	Mar. 31, 2024	Mar. 31, 2023	Nov. 11, 2022	Dec. 31, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Number of methodologies/guidelines \| guideline		2
Number of regulatory capital ratios \| capitalRatio		3
Percentage of G-SIB leverage ratio buffer to G-SIB capital surcharge, effective on prior and current period					0.75%
Percentage of increase of G-SIB leverage ratio buffer to G-SIB capital surcharge, effective on and after April 1, 2024	0.0005
Consolidated, MUFG
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum Common Equity Tier 1 capital ratio		0.0868	0.0866
Tier 1 leverage ratio		0.0395	0.0395
Basel III
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Number of approaches \| Approach		3
FSA's requirements applicable to Japanese banking institutions
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum Common Equity Tier 1 capital ratio				0.0450
Capital conservation buffer		2.50%	2.50%
G-SIB surcharge		1.50%	1.50%
Countercyclical buffer		0.18%	0.16%
Tier 1 leverage ratio	0.0315						0.0300
Percentage of G-SIB leverage ratio buffer to G-SIB capital surcharge, effective on prior and current period					50.00%	50.00%	50.00%
Basel III for Security Companies in Japan
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital ratio required for financial Instruments firms to maintain by Financial Instruments and Exchange Act and related ordinance		120.00%
Minimum capital ratio requirement for financial instruments firms which will call for regulatory reporting		140.00%
Minimum capital ratio requirement for financial instrument firms which may lead to a suspension of all or part of the business for a period of time and cancellation of a registration		100.00%
Basel III for Security Companies in Japan \| Stand-alone, Mitsubishi UFJ Morgan Stanley Securities
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Amount of capital accounts less certain fixed assets		¥ 593,476	¥ 564,169
Percentage of capital accounts to the total amounts equivalent to market, counterparty credit and operational risks		292.10%	300.70%
Basel III for Security Companies in Japan \| Consolidated, MUFG
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Amount of capital accounts less certain fixed assets		¥ 596,304	¥ 564,266
Percentage of capital accounts to the total amounts equivalent to market, counterparty credit and operational risks		290.30%	300.70%