Aiming to become a foundry company loved by customers

United Semiconductor Japan Co., Ltd. (USJC) got off to a new start on October 1st, 2019, as a member of United Microelectronics Corporation (UMC), leading global semiconductor foundry.

The former company, Mie Fujitsu Semiconductor Limited (MIFS) has provided high-quality technologies and services to customers worldwide as 300㎜ wafer foundry joint venture between Fujitsu Semiconductor Limited (FSL) and UMC.
Its manufacturing base, Mie Plant has contributed to the growth of the semiconductor industry in Japan through the development and mass production of advanced memory and logic devices.

USJC offers a platform that realize low power consumptions with embedded non-volatile memory options. We are also working on supporting RF options, in particular millimeter wave technology which are suitable for automotive and IoT market. Our strength are stringent production management system, highly experienced engineers, continuing production improvement activities, and superior risk-response capabilities such as hybrid seismic isolation structures and LNG bases.

USJC will contribute to improve the market competitiveness of our customers' products by dramatically enhancing their performance and realizing IoT society as a Japan-based semiconductor wafer fabrication.

United Semiconductor Japan Co., Ltd.
Chuang, Yu-Chih, Representative Director and Chairman
Nobuhiro Misawa, Representative Director and President

  • SF Tzou

    莊 裕智　Chuang, Yu-Chih
    Chairman

    Mr. Chuang has served as Representative Director and Chairman of United Semiconductor Japan Co., Ltd. since February 2026. He joined UMC in 1993 and has since worked in the manufacturing and technology divisions, holding a series of key positions such as Department Manager and Division Director overseeing production control, R&D, and process engineering at UMC Fab 8E in Hsinchu and UMC Fab 12A in Tainan. In 2017, he was appointed Senior Fab Director of UMC Fab 12A, and in 2019, Assistant Vice President of UMC Fab 12A Operations. He has served as Vice President of United Microelectronics Corporation (UMC) Fab 12A & 12M Operations since October 2025 to present.

  • Nobuhiro Misawa

    三沢 信裕　Nobuhiro Misawa
    President

    Nobuhiro Misawa has served as President of United Semiconductor Japan Co., Ltd (USJC) since April, 2024. In 1988, he joined Fujitsu Limited as a process engineer. After many years of experience in porting technology and process integration businesses, he was appointed to several important positions of process development division of Mie Fujitsu Semiconductor Limited (MIFS). he has also been in charge of Mie Plant Manager since 2022 to present.

Management February 13, 2026

Director

  • Representative Director and Chairman
    Chuang, Yu-Chih
  • Representative Director and President
    Nobuhiro Misawa
  • Director
    Takahiko Nakajima
  • Director
    Wang Wei Che
  • Director
    Hsu, Shu-Fen
  • Director
    Masanori Suzuki

Statutory Auditor

  • Statutory Auditor
    Chu, Wei-Chieh

Corporate Vice President

  • President
    Nobuhiro Misawa
  • Senior Vice President
    In charge of Security Export Control, Human Resources
    Takahiko Nakajima
  • Senior Vice President CFO
    Wang Wei Che
  • Senior Vice President
    In charge of Customer Engineering, Technology Development
    Keizaburo Yoshie