Mizuho Financial Group
One of Japan’s major integrated financial groups, providing banking, securities, trust, asset-management, and advisory services.
Last updated October 14, 2026
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Overview
Mizuho Financial Group, Inc. is a Japanese financial holding company headquartered in Tokyo. It was created during Japan’s banking-consolidation wave from the combination of Dai-Ichi Kangyo Bank, Fuji Bank, and the Industrial Bank of Japan. The group’s name, Mizuho, refers to an abundant or bountiful rice harvest, a traditional expression associated with Japan. The combination was announced in 1999 and Mizuho Holdings was established in 2000. On 1 April 2002, the three predecessor institutions were reorganized into Mizuho Bank and Mizuho Corporate Bank. The transaction created one of the world’s first banking groups with more than one trillion U.S. dollars in assets and made Mizuho an early example of the large Japanese “megabank” model. Mizuho Holdings was succeeded operationally by Mizuho Financial Group in 2003, while the group’s subsidiaries were placed under the new holding company’s direct control in 2005. Mizuho’s business spans retail and commercial banking, corporate and investment banking, securities, trust banking, asset management, private wealth management, research, information services, and mergers-and-acquisitions advice. Its principal operating companies include Mizuho Bank, Mizuho Trust & Banking, Mizuho Securities, and Mizuho Capital. The group is also the majority owner of Asset Management One. Mizuho Bank serves individuals, small and medium-sized businesses, and corporations in Japan, while the group’s international operations support Japanese companies abroad and provide financing, markets, transaction-banking, and advisory services to overseas clients. The group inherited extensive corporate relationships from its predecessor banks and their historical business networks, including the DKB, Fuyo, and Industrial Bank of Japan groups. It expanded its international presence during the 2000s, particularly in China, the Americas, Europe, and the Middle East. Mizuho’s overseas operations were also exposed to the global subprime-mortgage crisis, during which its New York activities recorded substantial losses on securities backed by subprime mortgages. A major structural simplification took place on 30 June 2013, when Mizuho Bank and Mizuho Corporate Bank were merged into a single Mizuho Bank. The group subsequently pursued governance and technology changes, including board reforms in 2014, the establishment of a global transaction-banking headquarters in Singapore in 2016, and blockchain-related development work with Cognizant. In December 2023, Mizuho completed the acquisition of U.S. mergers-and-acquisitions advisory firm Greenhill & Co., strengthening its stated ambition in the American advisory market. Mizuho is listed in Japan and has American depositary receipts listed in the United States. It is included in major Japanese equity indices and has been identified as a systemically important bank. The group combines a large domestic branch and ATM network with global institutional, corporate, markets, trust, and wealth-management activities. Its public profile has also been shaped by regulatory issues involving customer loans connected to organized crime and by scrutiny of its financing of coal-sector developers.
History
Mizuho’s history begins with the integration of Dai-Ichi Kangyo Bank, Fuji Bank and the Industrial Bank of Japan. The three institutions signed an agreement for comprehensive integration in 1999, reflecting the pressure on Japanese banks to consolidate after the collapse of the asset-price bubble and the deterioration of bank balance sheets. Mizuho Holdings was established in September 2000, while the banking operations were reorganized into Mizuho Bank and Mizuho Corporate Bank in April 2002. The former served individuals and smaller businesses, while the latter focused on large corporations, financial institutions and public-sector customers. The initial integration was ambitious but operationally difficult. The 2002 migration and integration of banking systems produced extensive service disruptions, making technology governance and integration execution lasting issues for the group. Mizuho Financial Group was established in January 2003 as a new holding company under the restructured group architecture and was subsequently listed in Japan. A major early objective was to simplify the complicated post-merger structure, dispose of problem assets, strengthen compliance and repay public support. In October 2005, Mizuho Financial Group acquired all shares of Mizuho Bank and Mizuho Corporate Bank held by the former Mizuho Holdings-related structure. In July 2006, the group completed repayment of public funds injected into its predecessor banks. It also developed international relationships and specialist businesses, including investment-management cooperation with BlackRock, overseas finance activities and the acquisition of Eurekahedge by Mizuho Corporate Bank in 2011. The securities business was repeatedly reorganized. The former Mizuho Securities and Shinko Securities were combined in 2009, and the resulting Mizuho Securities later absorbed Mizuho Investors Securities in 2013. Mizuho Financial Group also moved to bring key operating companies more directly under the holding company. In 2011, Mizuho Trust & Banking, Mizuho Securities and Mizuho Investors Securities were made wholly owned subsidiaries through a share-exchange process. A decisive structural change occurred on 1 July 2013, when Mizuho Corporate Bank absorbed Mizuho Bank and changed its name to Mizuho Bank. This eliminated the group’s parallel domestic banking structure and was intended to improve coordination, sales effectiveness and resource allocation. The group’s brand communications increasingly emphasized “One Mizuho,” expressing the idea that banking, securities, trust and other businesses should operate as one coordinated financial group. Mizuho continued to develop corporate, investment and international banking while expanding its asset-management, wealth-management, trust, research and technology capabilities. In 2023, Mizuho completed the acquisition of Greenhill & Co., adding a specialist advisory business in mergers, acquisitions and restructuring. In the 2020s, the group also faced renewed attention to system resilience after a series of operational incidents. These events reinforced the importance of stable core systems, clear accountability, risk management and customer communication. The group’s more recent strategy has treated technology and digital capability as central to banking rather than as a separate support function. Mizuho has publicized digital-transformation programs and cooperation with external technology and data companies. It has also considered integrating Mizuho Research & Technologies into Mizuho Bank, with the stated objective of closer coordination between information systems and banking operations. Alongside technology, the group’s public positioning highlights sustainability transformation, social problem-solving, corporate growth and support for customers’ long-term ambitions.
- 2023
Greenhill acquisition is completed
[5]Mizuho completed its acquisition of Greenhill & Co. through its United States business.
- 2013
The two domestic banks become one Mizuho Bank
[7]Mizuho Corporate Bank absorbed Mizuho Bank and changed its name to Mizuho Bank.
- 2009
Mizuho Securities is formed through a merger
[1]Shinko Securities absorbed the former Mizuho Securities and adopted the Mizuho Securities name.
- 2006
Public funds are repaid
[1]The group completed repayment of public funds provided to its predecessor banks.
- 2005
Bank subsidiaries are transferred to Mizuho Financial Group
[1]The holding company acquired all shares of Mizuho Bank and Mizuho Corporate Bank held by the former structure.
- 2003
Mizuho Financial Group is founded
[1]Mizuho Financial Group was established as the group’s financial holding company.
- 2002
Banking businesses are reorganized under the Mizuho name
[4]The predecessor banks were reorganized into Mizuho Bank and Mizuho Corporate Bank.
- 2000
Mizuho Holdings is established
[1]The predecessor holding company was established as part of the three-bank integration.
- 1999
Three predecessor banks agree to integrate
[1]Dai-Ichi Kangyo Bank, Fuji Bank and the Industrial Bank of Japan signed an agreement for comprehensive integration.
Products and positioning
An integrated Japanese megabank group combining commercial banking, securities, trust, asset management and advisory capabilities, with a strong focus on corporate finance, institutional clients, international transactions and coordinated group solutions.
Commercial banking · 2002
Mizuho Bank
Mizuho Bank is the group’s principal commercial bank. It serves individuals, small and medium-sized enterprises, large corporations, public-sector entities and international customers through deposits, lending, payments, foreign exchange, trade finance, transaction banking and other financial services. Since the 2013 merger of Mizuho Corporate Bank and Mizuho Bank, it has been the group’s unified domestic banking platform.
Securities and investment banking · 2009
Mizuho Securities
Mizuho Securities provides securities brokerage, equity and debt underwriting, investment banking, markets, research and related capital-markets services. Its current form reflects the consolidation of predecessor securities businesses, including the 2009 combination involving Shinko Securities and the later absorption of Mizuho Investors Securities.
Trust banking and wealth services · 2000
Mizuho Trust & Banking
Mizuho Trust & Banking provides trust, custody, pension, real-estate, inheritance, asset-management and wealth-related services. Its capabilities complement the group’s commercial-banking and securities businesses, particularly for institutional investors, corporations, high-net-worth clients and customers requiring succession or real-estate solutions.
Data and marketing services · 2024
Mi–Int LinX
Mi–Int LinX is a marketing-support service developed by Mizuho with CyberAgent and Flywheel. The initiative applies data analysis and digital capabilities to advertising and customer communications while emphasizing the handling and protection of personal information. It represents Mizuho’s effort to develop businesses beyond conventional financial intermediation.
Controversies
2021
Repeated ATM and banking-system incidents
A series of operational incidents in the early 2020s, including problems affecting ATMs and account services, led to regulatory attention and public criticism of Mizuho’s systems governance and customer communications.
2021
Mizuho president apologizes for ATM shutdowns
Mizuho Financial Group President Sakai Tatsufumi apologized for systems failures that shut down ATMs across Japan. Mizuho said the problems had been fixed and described changes intended to prevent ATMs from retaining cards and bankbooks during a future system failure.
2011
Post-earthquake system disruption
Mizuho experienced another major systems failure during the period following the 2011 earthquake and tsunami in Japan. The disruption renewed scrutiny of information-technology controls, crisis management and accountability.
2002
Major banking-system integration failures
The initial integration of Mizuho’s banking systems produced widespread service disruptions. The incident became a significant governance and operational-risk issue for the newly consolidated group.
Marketing campaigns
- 2025Challenge with Blue
Japan
Mizuho’s corporate brand campaign presents blue as a symbol of inner passion, persistence and the strength to attempt difficult projects. The campaign used television commercials, digital films, outdoor advertising, in-branch content and social media, and connected the message with the group purpose of challenging and flourishing together.
Outcome. The campaign broadened the group’s corporate communication beyond individual subsidiaries and highlighted examples of Mizuho-supported challenges in areas such as space, animation and social problem-solving.
- 2013One Mizuho
Japan · International
The One Mizuho brand platform emphasized coordination among the group’s banking, securities, trust and other financial businesses. It followed earlier statements including “Value Communication” and “Channel to Discovery.”
Outcome. The platform became a long-running expression of Mizuho’s integrated-group strategy and was later succeeded in public communications by the purpose statement “Together, we challenge. Together, we flourish.”
Brand decisions
2024
Consider integrating Mizuho Research & Technologies into Mizuho BankStrategyBackground
The group identified closer alignment between technology operations and banking businesses as important for digital transformation and system stability.
Action taken
Mizuho considered an absorption merger with Mizuho Bank as the surviving company, targeted for April 2026.
Aftermath
The proposed structure would place technology capabilities more directly within the banking operation, subject to completion of the planned process.
2023
Acquire GreenhillM&ABackground
Mizuho sought to strengthen its global advisory and investment-banking capabilities, particularly in mergers, acquisitions and restructuring.
Action taken
Mizuho’s United States business acquired Greenhill & Co. and completed the transaction in December 2023.
Aftermath
Greenhill became part of Mizuho’s international advisory platform.
2013
Unify the two domestic commercial banksStrategyBackground
Mizuho maintained separate domestic banking entities after the original three-bank integration, creating duplicated structures and coordination challenges.
Action taken
Mizuho Corporate Bank absorbed Mizuho Bank and adopted the Mizuho Bank name.
Aftermath
The transaction created a single principal domestic commercial bank and supported the group’s One Mizuho integration strategy.
Recent events
- 2025
Mizuho launches the “Challenge with Blue” corporate communication campaign[3]
Campaign
Mizuho introduced a corporate communication platform built around the idea that blue represents passion, resilience and the willingness to take on difficult challenges. The campaign included television, digital, outdoor and in-branch content, with actors Natsuki Deguchi and Ryo Yoshizawa associated with the campaign.
- 2024
Mizuho considers integrating Mizuho Research & Technologies into Mizuho Bank[6]
Other
The group considered an absorption merger under which Mizuho Bank would remain the surviving company. The stated aims were to make technology a more central banking capability, improve coordination between systems and business teams, and support digital transformation and operational stability.
- 2023
Mizuho completes acquisition of Greenhill[5]
M&A
Mizuho completed the acquisition of Greenhill & Co. through its United States business, adding a global mergers-and-acquisitions and restructuring-advisory capability.
- 2023
Mizuho completed Greenhill & Co. acquisition[4]
M&A
Mizuho completed its acquisition of the U.S. mergers-and-acquisitions advisory firm Greenhill & Co. to expand its position in the American advisory market.
- 2016
Mizuho expanded global transaction-banking capabilities[4]
Other
Mizuho established a global transaction-banking headquarters in Singapore and maintained related offices in China, Hong Kong, Tokyo, London, and New York.
- 2016
Mizuho entered blockchain technology collaboration[4]
Other
Mizuho began working with Cognizant on blockchain-related methods for protecting private banking records.
- 2014
Mizuho undertook board and governance reforms[4]
Leadership change
The company reformed its board structure as part of an effort to streamline governance and create a more unified group identity.
- 2013
Mizuho banks unified under one Mizuho Bank[4]
M&A
Mizuho Bank and Mizuho Corporate Bank merged, simplifying the group’s domestic banking structure.
- 2008
Mizuho exposed to subprime-mortgage losses[4]
Other
Mizuho’s New York operations incurred major losses connected with collateralized debt obligations backed by U.S. subprime mortgages during the global financial crisis.
- 2002
Mizuho operating banks legally reorganized[4]
M&A
The three predecessor banks were reorganized into Mizuho Bank and Mizuho Corporate Bank, separating retail and smaller-business banking from corporate and institutional banking.
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Sources9 sources
- 1Mizuho Financial Group corporate profile and historymizuho-fg.co.jp
- 2Mizuho Financial Group official websitemizuho-fg.co.jp
- 3Mizuho brand campaign: Challenge with Bluemizuho-fg.co.jp
- 4Mizuho Financial Group, Wikipediaen.wikipedia.org
- 5Mizuho completes Greenhill acquisitionmizuho-fg.co.jp
- 6Mizuho considers bank and technology-subsidiary integrationnikkei.com
- 7The two domestic banks become one Mizuho Banknikkei.com
- 8One Mizuhoja.wikipedia.org
- 9Mizuho president apologizes for ATM shutdownsnewsonjapan.com
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