Simplex Asset Management

Simplex Asset Management is one of the largest independent asset management firms in Japan, offering a diverse range of investment opportunities such as Japanese equity strategies and quantitative investment strategies to institutional investors both domestically and internationally.

Products

Japanese Equity Active Management

Japanese Equity Active Management

We focus on unique investment opportunities in Japan, with the goal of creating and adding value through behind-closed-doors engagement.

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ETFs

ETFs

We meet investors' needs by offering a broad range of products, from index to active ETFs.

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Quantitative Investment Strategies

Quantitative Investment Strategies

We provide highly liquid and transparent multi-asset/multi-strategy funds tailored for Japanese institutional investors and pension funds.

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Bonds/Private Debt

Bonds/Private Debt

We provide highly liquid and transparent multi-asset/multi-strategy funds tailored for Japanese institutional investors and pension funds.

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Company Information

Company Name

Simplex Asset Management Co., Ltd.

President and CEO

Hiromasa Mizushima

Established on

November 15, 1999

Capital

370 million yen

Assets Under Management

1,369.0 billion yen (Group total: 1,371.7 billion yen*) as of September 30, 2025
*The Group AUM is the total sum of the AUM of the respective Group companies. When the investment management and investment advice of a fund is delegated within the Group companies, the duplicated AUM is excluded from the aggregation.

Shareholder

Simplex Financial Holdings Co., Ltd. (100%)

Regulatory Registration

Financial Instruments Operator registered by Director General of Kanto Finance Bureau (Kinsho No. 341)

Registered Businesses

Investment Advisory Business
Investment Management Business (Discretionary Investment Management and Investment Trust Fund Management)
Type II Financial Instruments Business

Membership in Industry Associations

Japan Investment Advisers Association
The Investment Trusts Association, Japan
Type II Financial Instruments Firms Association

Board Members

Chairman Noriyuki Ogasawara
President and CEO Hiromasa Mizushima
Director Yuji Shimoyama
Statutory Auditor Kazuo Ishige (Lawyer)

Legal Advisor

Masato Yamanaka

Organization

Shareholders

Statutory Auditor

Board

CEO

  • Compliance Division

  • Risk Management Division

  • Internal Audit

  • Investment Division

  • Marketing Division

  • Business Support Division

  • CEO Office

  • IT Division

  • Administration Division

Board Members

Noriyuki Ogasawara

Chairman

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Hiromasa Mizushima

President and CEO

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Yuji Shimoyama

Board Member

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Kazuo Ishige

Statutory Auditor, Attorney at Law

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Masato Yamanaka

Legal Adviser, Attorney at Law admitted in Japan , New York and Washington D.C, USA

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Access

Simplex Asset Management Co.,Ltd.
27th Floor, Shin-Marunouchi Building 1-5-1 Marunouchi, Chiyoda-ku, Tokyo 100-6527 Japan
TEL +81 (3) 6843 1413

Access by Rail/Subway:
Tokyo Sta. (JR), Tokyo Sta. (Marunouchi Line), Otemachi Sta. (Chiyoda, Mita, Tozai and Hanzomon Line), Nijubashimae Sta. (Chiyoda Line)

Access by Car:
Please use the parking lot at the Shin-Marunouchi Building or other parking spaces in the vicinity.

Please take the C-zone elevator after passing thorough the security control desk located on the ground floor (1F) of the office zone.

News

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Noriyuki Ogasawara

Chairman

Chairman of the Board at Simplex Asset Management Co., Ltd.
Director of Simplex Capital Investment Co., Ltd.
Outside Director of Simplex Holdings, Inc.
Statutory Auditor of Simplex Inc.
External Director of Japan Investment Corporation

Mr. Ogasawara was formerly appointed and given responsibilities as Chairman & Representative Director of Nikko Systems Solutions Ltd. in April 2011. Prior to that, his career primarily has revolved around the Nikko Group including but without limitation as Executive Deputy President of Nikko Cordial Securities Inc. (October 2009), Vice President of Nikko Citi Holdings in May 2008, Executive Officer & Executive Deputy President of Nikko Cordial Securities Inc. in February 2007, Executive Deputy President of Nikko Cordial Securities Inc. in February 2005 and Chairman of Monex Beans Holdings in August 2004.
Waseda University, Bachelor in Finance

Hiromasa Mizushima

President and CEO

President and CEO of Simplex Asset Management Co., Ltd.
President and CEO of Simplex Financial Holdings Co., Ltd.
President and CEO of Simplex Capital Investment Co., Ltd.
Director of Simplex Asset Management (HK) Company Limited.

Mr. Mizushima was a founding member of Nikko Citigroup´s joint venture in 1999, and led the success of the large scale operation between the Japan and US giants. Through August of 2005 he was head of Nikko Citigroup´s equity division, responsible for global sales, trading, capital markets, derivatives and research. Mr. Mizushima joined Nikko Securities in 1977. Mr. Mizushima´s experiences managing thousands of people allow him to lead Japanese corporate managers effectively towards more shareholder friendly policies. Waseda University, Bachelor in Finance. Member of Japan Association Corporate Executive (Committee on Management Reforms, Committee on Political and Administrative Reforms, Committee on Financial and Capital Markets, Committee on Asia-Japan Relations) Member of Japan Association of Corporate Directors, Member of "Study Group for Reinforcing Japan´s Competitiveness.

Yuji Shimoyama

Board Member

Managing Director

Mr. Shimoyama previously worked at Nikko Securities, Barclays Capital Japan, and Mizuho Securities predominantly with fund structuring and product development. Keio University, Bachelor in Engineering. CMA.

Kazuo Ishige

Statutory Auditor, Attorney at Law

Statutory Auditor of Simplex Asset Management Co., Ltd.
Statutory Auditor of Simplex Financial Holdings Co., Ltd.
Statutory Auditor of Simplex Capital Investment Co., Ltd.
Partner of Hokuto Sogo Law Offices

Mr. Ishige previously worked at Industrial Revitalization Corporation of Japan (a sovereign-wealth fund) as Senior Manager. Served as Statutory Auditor of Fidec Corporation (a TSE listed financial company), Skynet Asia Airways Co., Ltd., Hotel New Otani Kumamoto and other companies.
Member of the Special Committee for Takeover Defense of Unimat Soyokaze Co. Ltd. (a JASDAQ listed care service company). Recently appointed as the Advisory Board Member of the Management Committee for the Guidelines for Individual Debtor Out-of-Court Workouts, a FSA program for the Great East Japan Earthquake recovery.
University of Tokyo, Bachelor in Economics and Business Administration
Member of Japan Association of Statutory Auditors.

Masato Yamanaka

Legal Adviser,
Attorney at Law admitted in Japan,
New York and Washington D.C, USA

Koma Glocal Law Office

Mr. Yamanaka has more than 10 years of experience in the field of finance and corporate law. He has authored numerous articles and has contributed to various publications, in particular, pertaining to finance law and corporate law related matters, including regulation of financial institutions and general corporations, securitization and liquidation, collective investment schemes, as well as disclosure in primary and secondary securities markets, and derivative transactions. His practice also covers a number of litigation related to financial products. Prior to joining Koma Glocal Law Office, he worked for Mitsui, Yasuda, Wani & Maeda and Baker & McKenzie.