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WDB Group executives
WDB coco Co., Ltd.
President & CEO
Haruhiko Taniguchi
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Born April 16, 1975 in Okayama prefecture. 1999 - Graduated from College of Business Administration, Ritsumeikan University. Joined the Company in 1999. During the early days of research staffing, he was actively involved in the establishment and operation of new branches and WDB Eureka Co., Ltd. (currently EUREKA Company). As a central figure in developing the research staffing market, he contributed significantly to the remarkable expansion of the human resources service business. 2004 - executive director of WDB EUREKA Co., Ltd. (currently EUREKA Company) 2005 - Took part in management of business regions. 2012 - director of WDB Co., Ltd. June 2014 - director of WDB ICO Co., Ltd. (currently WDB coco Co., Ltd.) November 2014 - President & CEO. In the CRO industry, where high costs were the norm, he has achieved the delivery of low-cost yet high-quality services through the standardization and division of operations. In 2019, he oversaw the CRO business, including the public listing of WDB Coco Co., Ltd. He focuses on addressing the underlying challenges faced by clients in outsourcing, and dedicates himself to reforming and advancing operational processes while enhancing the added value of services.
Oy Medfiles Ltd. CEO
WDB Medical Data, Inc.
President & CEO
Norifumi Ninokata
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Profile
Born October 17, 1975 in Hyogo prefecture. 1999 - Graduated from the Department of Mechanical Engineering, Tokyo University of Science. 2013 - Completed Graduate School of Innovation Studies (Management of Technology), Tokyo University of Science. Worked for a consulting company. Joined the Company in 2005. Took part in making business plans, personnel work and management of the subsidiaries. Became a President & CEO of Business Succession Partners Co., Ltd. in 2010. 2015 - President & CEO of WDB Medical Data, Inc. 2018 - President of DZS Clinical Services, Inc. (Rebranded to Medfiles USA in 2023) 2020 - President & CFO of Oy Medfiles Ltd. 2021 - CEO of Oy Medfiles Ltd.
WDB KOUGAKU Co., Ltd.
President & CEO
Shuji Tashiro
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Born July 30, 1985 in Fukuoka prefecture. 2008 - Graduated from the Inter-Faculty Institute for International Studies, Ritsumeikan University. Joined the Company in 2008. Worked as a salesperson. 2011 Took part in managing branch offices. 2014 - corporate officer of WDB KOUGAKU Co., Ltd. 2016 - director. 2017 - managing director. 2022 - President & CEO.
DOCO1 Co., Ltd.
President and Executive Officer
WDB Business Succession Partners Co., Ltd. President
Kazushi Sasaura
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Born June 19, 1974, in Shimane Prefecture. 1997 - Graduated from the Faculty of Economics, Kobe University. 2014 - Completed Graduate School of Strategic Management, Chuo University. Joined the Company in 1997. Took part in setting up human resource staffing business in the field of science research and was involved in launching branches across the whole Kanto area. In 2001, he left the Company to pursue his aspiration of expanding his family's Japanese confectionery business, which he had held in mind for some time. To learn store management broadly, he joined Culture Convenience Club Co., Ltd., which runs TSUTAYA chain of stores. In 2005, he returned to the WDB Group to gain even broader experiences in order not only to expand the family business but to contribute to the revitalization of the regional economy as a whole. He took the responsibilities of general management of the area's business administration and branch office operations. In April 2014, became Managing Director of Kaken Geneqs Co., Ltd. (a wholly owned subsidiary of WDB Holdings Co., Ltd.) and appointed President & CEO in November 2014. In January 2022, resigned as President and CEO following the separation from the WDB Group by a whole stock transfer transaction. In November 2022, appointed Director of WDB Business Succession Partners Co., Ltd. (current position). In March 2025, appointed President of DOCO1 Co., Ltd., and President and Executive Officer in April of the same year(current position).
NEZOT Co., Ltd.
Director and Managing Executive Officer
DOCO1 Co., Ltd.
Managing Director and Executive Officer in charge of Systems
Yuichiro Matsumoto
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Profile
Born April 20, 1982, in Tokyo. 2005 - Graduated from the College of Bioresource Science, Nihon University. 2007 - Completed the Graduate School of Bioresource Science, Nihon University. Spending his school days entirely on research and study, started his career as a research staffing sales professional and gained experience. In 2011, with his achievement recognized, promoted to Manager at Lab & Training centers to identify dispatched staff's capabilities and aptitudes and to provide support for skill-up. Engaged in operations and management of the Lab & Training centers across the nation. Implemented WDB's unique online training system and established the basis of human resource development training at WDB. In 2016, appointed President & CEO, WDB India Pvt. Ltd. (Dissolved in January 2022), also as Representative Director at WDB Chemical Laboratory Co., Ltd. (Merged with WDB Co., Ltd. in January 2022). The two companies jointly provided synthesis experiment services. Produced a platform that enabled a real-time progress status check of synthesis experiment projects overseas (the service discontinued in January 2022). In June 2022, appointed Director, NEZOT Co., Ltd. In March 2025, appointed Managing Director of DOCO1 Co., Ltd., and in April, Director and Managing Executive Officer of NEZOT Co., Ltd., and Managing Director and Executive Officer in charge of Systems at DOCO1 Co., Ltd. (current position), responsible for the WDB Group's DX acceleration capitalized on his accumulated knowledge and experiences.
WDB Co., Ltd.
Director and Managing Executive Officer in charge of SD
NEZOT Co., Ltd.
Director and Managing Executive Officer
Hideo Kuroki
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Profile
Born April 3, 1986, in Miyazaki Prefecture. 2009 - Graduated from the Faculty of Economics, Yamaguchi University. Joined the company in 2009. After gaining experience as a research staffing sales professional, held positions as manager of Tachikawa Branch, Osaka Branch, and Kusatsu Branch since 2014. Leveraging his experience and achievements, involved in the planning and formulation of the management strategy of WDB Co., Ltd. from 2019, and since 2020, has been working to solve human resources business issues at NEZOT Co., Ltd. In June 2022, appointed as Executive Officer, NEZOT Co., Ltd., concurrently holding the position of Strategic Planning Department at WDB Holdings Co., Ltd. from November 2022 (current position). In October 2023, became Director of NEZOT Co., Ltd. In June 2024, appointed Director of WDB Co., Ltd. In April 2025, appointed Director and Managing Executive Officer in charge of SD at WDB Co., Ltd. (current position) and Director and Managing Executive Officer of NEZOT Co., Ltd. (current position), responsible for enhancing the overall competitiveness and productivity of the group through platform development including "doconico," and streamlining of business processes using IT.
Cobridge Co., Ltd.
Managing Director and Executive Officer
Kohei Saito
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Born September 3, 1979 in Tokyo. Graduated from the Faculty of Commerce at Chuo University in 2002. Joined the company the same year. After gaining experience as a salesperson for research staffing, he held positions as manager of Yokohama Branch, Saitama Branch, Kawasaki Branch, etc. since 2006, contributing to the dramatic expansion of sales channels for research staffing, mainly in the Kanto area. After that, he held various positions such as general manager, and while involved in branch management, he put many company-wide projects on track and promoted growth strategies. In March 2023, he was appointed Managing Director and Executive Officer of Corbridge Co., Ltd. (current position). Leveraging his knowledge and experience, he has contributed to the sales expansion of the entire WDB Group, including the domestic CRO business, and has built a foundation in a wide range of fields.
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