Keiji Nagano

Chairman and Executive Director

After working at ExxonMobil Corporation and then Bain & Company, Nagano started taking part in New Media as the director of New Media Japan Inc. in 2000. While he was vice-president of the Tokyo office of Bain & Co., he also played a key role as the director of the South Korea office for four years in establishing the office. He led projects with clients in various lines of businesses and gained wide experience in communications, high technology, entertainment, and the healthcare businesses at Bain & Co.

Moreover, he supported foreign capital companies to launch businesses in Japan and carried them toward success by understanding them at the operational level on the lines.

He graduated from the Faculty of Technology at the University of Tokyo (chemical engineering) and earned a master’s degree in business economics (MBA) at Columbia University.

Jun Okada

President and Representative Director

He started working as a consultant at the Tokyo office of Bain & Co. in 1998, and was engaged in many projects, including bio investment support for a venture capital company and development support for a pharmaceutical company (as a resident person for a year). In 2005, he started taking charge of the corporate planning of 3-D Matrix and took up the post as director in 2007,and assumed his current position in 2016.

He graduated from the Law Faculty of the University of Tokyo and earned a master’s degree in business economics (MBA) at the INSEAD in France.

Tomoyuki Arai


In 1996, He started working at Pronexus Inc. (specialist of supporting corporate disclosure) and was involved in the tasks of many listed companies and those targeting IPOs. Since 2006, he was engaged in consulting services for IPOs and internal control systems at the CSBA consulting group. In 2007, he became a director of CSBA Investment. Subsequently, he was responsible for achieving the IPO (JASDAQ) for Ascot Corp. in 2008. He started serving in the sections for compliance and corporate planning at 3-D Matrix in 2008 and assumed the post of director in July 2012.

Satoru Kobayashi

Executive Officer, Head of Business Development

After working at Fresenius medical care, he started working in the Business development at 3-D Matrix in 2007 and assumed his current position in June 2017.

He graduated Hokkaido University Graduate School of Medicine.

Takao Miki

Executive Officer, Head of EMEA Business

Joined Boston Consulting Group (BCG) in 2014 after working at Bain & Company, GE Healthcare Japan.
As a Principal in BCG, he led more than 10 projects in healthcare and manufacturing industries with multinational members. Regarding the healthcare practices, he supported Japanese trading company to build up a medical business in Southeast Asia and led to develop mid-term corporate strategy for a medical device manufacture. In GE Healthcare, he concluded the partnership with Softbank Telecom to start new businesses in the healthcare IT field and achieved a global award.

Received his MBA from Massachusetts Institute of Technology and MS from  the University of Tokyo.

Toshi Amanuma

Executive Officer, Head of US Business

Toshi started his career at strategy consulting firm Bain & Company, and continued to gain experience at Sony Corporation, 3-D Matrix and JBIC IG Partners. He contributed to a wide range of consulting projects at Bain’s Tokyo and Sydney offices, and at Sony he was involved in evaluating various technology seeds at the HQ R&D department, and co-created a network-service development team. Recently he served as managing director of 3-D Matrix EMEA, responsible for commercializing 3-D Matrix’s first medical device product across the EMEA region, and as managing director at JBIC IG Partners, a fund GP subsidiary of Japanese government-owned bank JBIC (Japan Bank of International Cooperation), involved in making fund investments and leading fund formation projects. Toshi rejoined 3-D Matrix in August 2019 to lead the US subsidiary, 3-D Matrix, Inc.

Toshi received his MBA from the Tuck School of Business at Dartmouth College, and his MS from Waseda University.