Press Release

WASEDA University Ventures (WUV) has made a JPY 100 million founding investment in Power Diamond Systems, Inc. – WASEDA’s original diamond semiconductor devices start-up

WASEDA University Ventures (WUV) has made a JPY 100 million founding investment in Power Diamond Systems, Inc. – WASEDA’s original diamond semiconductor devices start-up

- As the second project of the WUV 1st Fund, a deep-tech start-up from Waseda University engaged in the research and development of diamond semiconductor devices–


November 2, 2022


WASEDA University Ventures (WUV) announces that it has made a JPY 100 million founding investment in Power Diamond Systems, Inc., a deep-tech start-up from Waseda University engaged in the research and development of diamond semiconductor devices, as the second project of the WUV 1st Fund.


Power Diamond Systems (PDS) is a fabless start-up engaged in the research and development of power diamond p-channel field effect transistors (p-FETs) for high-frequency operation and high-voltage switching applications. Combining these diamond p-FETs and other wide bandgap semiconductors (WBS) n-channel FETs, PDS is developing complementary power inverter systems.

PDS’s technology is based on elemental technologies invented by Professor Hiroshi Kawarada, at the School of Science and Engineering, Waseda University, a leader in diamond semiconductor device research. For example, hydrogen-terminated diamond FET technology (WASEDA's original method [1994]), newly developed silicon oxide terminated diamond FET technology [2020], and the world's first fabrication technologies of vertical diamond FETs.


Diamond semiconductors are not only the top-class material among existing power and high-frequency devices in terms of many physical properties but also one of the easiest and environment-friendly materials to procure. If diamond semiconductor devices and complementary power inverters are practically realized, they would bring innovation to the field of next-generation power electronics, such as quick charging systems for electric vehicles and high-efficiency renewable energy systems.


PDS will develop its business on a fabless basis by collaborating with Waseda University's nano-fabrication facilities. Furthermore, for a new diamond semiconductor market and academic progress, PDS will collaborate with major semiconductor manufacturers and researchers in the world.


WUV has been supporting PDS since before its foundation and has invited Dr. Tatsuya Fujishima, who has experience in semiconductor device R&D at ROHM Co. and MIT, as CEO to a co-founding team. Dr. Fujishima not only has expertise in semiconductor devices but also has extensive business experience at A.T. Kearney, Inc. and AI startups. WUV Co-Chairman Hiroaki Ohta, who has experience in semiconductor materials research at the Shuji Nakamura Lab at the University of California, Santa Barbara (UCSB), will be a Chairman of PDS.


Through the collaboration with Dr. Kawarada and Dr. Fujishima, WUV will contribute to the realization of a sustainable energy society through the social implementation of diamond semiconductors.

PDS Co-Founders

  • Hiroshi Kawarada, Ph.D., Co-Founder & CSO (Chief Scientific Officer)

After working at Hitachi, Ltd, Semiconductor Division, Osaka University as an assistant professor, and Waseda University as an associate professor, he became a professor at the Faculty of Science and Engineering, Waseda University. He had conducted research projects on diamond semiconductor devices in many national projects such as JST CREST, ALCA, A-STEP, COE Project, NEDO, etc. He has developed the current mainstream diamond FET method [Waseda University method (1994)].

  • Tatsuya Fujishima, Ph.D., Co-Founder & CEO

After working at ROHM Co., Ltd., he engaged in research on GaN (gallium nitride) semiconductor devices, semiconductor physical properties, and device/physical property evaluation at Tomás Palacios Lab., Massachusetts Institute of Technology (MIT). He also engaged in management and business consulting at A.T. Kearney, Inc., Mitsubishi Research Institute, Inc., and Deloitte Tohmatsu Venture Support Co., Ltd. since 2013. In 2020, he joined DATAGRID Inc., an AI startup from Kyoto University as an Executive Officer and CSO (Chief Strategy Officer).

About Power Diamond Systems, Inc.

  • Power Diamond Systems, Inc. (PDS)

  • Engaged in research and development of diamond semiconductor devices.

  • Establishment: August 8, 2022

  • Location: 1-22-3 Nishiwaseda, Shinjuku, Tokyo 169-0051

  • Co-Founders: Tatsuya Fujishima, Ph.D., CEO & Representative Director

Hiroshi Kawarada, Ph.D., CSO & Board Director


About WASEDA University Ventures (WUV)

  • WASEDA University Ventures (WUV) is a venture capital firm specialising in founding investments in the deep tech domain by creating new start-up companies that make use of academia and are based on "the practical application of scholarship".

  • Date of Incorporation: 5 April 2022

  • Location: Shinjuku, Tokyo

  • General Parteners: Ted Yamamoto & Hiroaki Ohta

  • URL: https://www.wasedavc.com/

  • Email: info@waseda.vc

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