Company Overview
| Company Name | VISION IV Corporation (Kabushiki Gaisha Vision IV) |
| Representative Director | Chiaki Ozeki |
| Established | March 11, 2021 |
| Capital | 12,500,000 yen |
| Business Activities | Development, manufacturing, and sales of diamond substrates for semiconductors and sensors |
| Head Office | Room 301, Building 1, Leading Venture Plaza 75-1 Onocho, Tsurumi-ku, Yokohama-shi, Kanagawa 230-0046, Japan |
| Banking Partners | Sumitomo Mitsui Banking Corporation, MUFG Bank, Mizuho Bank, Shoko Chukin Bank, Bank of Yokohama, Higashi-Nippon Bank, Jonan Shinkin Bank |
Company History
| March 20212 | VISION IV Corporation founded |
| August 2022 | Selected for the FY2022 R&D Startup Support Program / NEDO Entrepreneurs Program (NEP) Type B ◇ Commenced full-scale business operations with support from NEDO |
| October 2022 | Opened Tsurumi Laboratory at Leading Venture Plaza (current location) ◇ Began development of boron-doped diamond |
| February 2023 | Declared Partnership Building under the Small and Medium Enterprise Agency |
| March 2023 | Certified for Business Continuity Plan (BCP) by the Small and Medium Enterprise Agency |
| March 2023 | Received Excellence Award at the 3rd Social Implementation Grant for Technological Seeds from Hamagin Foundation Frontiers |
| December 2024 | Selected for Incubenture Grant by the Toshiaki Ogasawara Memorial Foundation |
| January 2025 | Selected for the 10th FASTAR Program by SME Support, Japan; Received JAFCO Group Award |
| February 2025 | Received Kanagawa Governor’s Award (Grand Prize) at the Kanagawa Business Audition |
| May 2025 | Joined Q-STAR (Quantum Strategic Industry Alliance for Revolution) as an Associate Corporate Member |
Access
- Address：
Room 301, Building 1, Leading Venture Plaza 75-1 Onocho, Tsurumi-ku, Yokohama-shi, Kanagawa 230-0046, Japan - By Train：5-minute walk from JR Tsurumi Line “Tsurumi-Ono Station”
- By Car：5-minute drive from Namamugi or Shioiri Interchange on the Metropolitan Expressway Yokohane Route
Founding Philosophy
Modern society faces enormous energy losses in power conversion. Our journey began with a strong desire to solve this pressing issue and contribute to global energy solutions.
The key lies in diamond—hailed as the ultimate semiconductor material.
Our name, “VISION IV,” symbolizes our unwavering vision to pioneer the future using diamond, a Group IV element. Founder Chiaki Ozeki, who transitioned from finance to tackling social challenges, and CTO Hiroyuki Hiraiwa, who brings over 40 years of expertise in materials science, joined forces to establish VISION IV. By delivering world-class diamond substrates crafted with the finest Japanese manufacturing techniques, we aim to maximize energy efficiency and shape the future of energy. Our mission is to create a sustainable society through technological innovation.
Executive Team
| President & CEO | Chiaki Ozeki | ||
| Director & CTO | Hiroyuki Hiraiwa | ||
| Director & CSO | Yukiko Kimura | ||
| Director & CMO | Kazuki Kobayashi | ||
| Director | Nobuyuki Terunuma |
Team Profiles
Chiaki Ozeki
President & CEO
Born in Yokohama, Kanagawa. Studied abroad at United World College of the Atlantic in the UK during high school. Earned a Bachelor of Laws from Kyoto University and an MBA from the Wharton School, University of Pennsylvania. Worked for 16 years at global investment banks including Salomon Brothers, Goldman Sachs, and UBS. Held senior M&A and finance roles at GE Japan and Nidec, and served as Head of Financial Planning at Nikon. Founded VISION IV Corp. in 2021.
Hiroyuki Hiraiwa
Director & CTO
Completed his Master’s in Engineering at Yokohama National University. Has been engaged in optical materials R&D since 1983, leading innovations in optical glass compositions, quartz glass for semiconductor lithography, calcium fluoride single crystals, laser components, photomasks, and nanoparticles. Expert in CVT technology, single crystal growth, and large-scale process engineering. Holds over 60 domestic and international patents. Highly regarded for bridging R&D and manufacturing using quality engineering principles.