Expanding production capacity for SiC power devices:

ROHM will acquire new production site

Willich-Münchheide, Germany, July 12, 2023 –ROHM has reached a basic agreement with Solar Frontier K.K. to acquire the assets of Solar Frontier's former Kunitomi Plant, located in Japan. The acquisition is scheduled to take place in October 2023 and will belong to the ROHM Group's main production bases. “This acquisition enables a fast production expansion by utilizing existing infrastructure. This way, ROHM will continue to quickly and reliably supply its customers,” states Wolfram Harnack, President at ROHM Semiconductor Europe. ROHM is aiming to start operation at the end of 2024. The role of semiconductors, one of ROHM’s core business fields is becoming increasingly important to achieving a decarbonized society. In particular, the automotive and industrial equipment markets are undergoing technological innovation such as electrification in order to reduce environmental impact and achieve carbon neutrality. With this, the demand is increasing – especially for power and analog semiconductors. As further expansion of the semiconductor market is expected, the ROHM Group intends to expand its production capacity continuously, particularly for silicon carbide (SiC) power devices, and ensure a stable supply to ROHM’s customers. 1. Outline of the other party to the agreement Company Name: Solar Frontier K.K. Representative: Hiroshi Watanabe, President & CEO Main Businesses: Development and sales of solar power systems Headquarters: Teigeki Building, 3-1-1 Marunouchi, Chiyoda-ku, Tokyo, Japan Shareholder: Idemitsu Kosan Co., Ltd 100% 2. Outline of the assets to be acquired (former Kunitomi Plant) Location: 1815 Taziri, Kunitomi-cho, Higashimorokata-gun, Miyazaki, Japan Site area: Approximately 400,000 m2 Total floor area: Approximately 230,000 m2 *Solar Frontier plans to continue to use part of the site and buildings as its business office (lease).

About ROHM Semiconductor ROHM Semiconductor is a global company of 507.8 billion yen (3.9 billion US dollars) per March 31st, 2023, with over 23,700 employees. The company develops and manufactures a very large product range from SiC Diodes and MOSFETs, Analog ICs such as Gate Drivers and Power Management ICs to Power Transistors and Diodes to Passive Components. The production of our high performing products is taking place in state-of-the-art manufacturing plants in Japan, Germany, Korea, Malaysia, Thailand, the Philippines, and China. ROHM Semiconductor Europe has its Head Office near Dusseldorf serving the EMEA region (Europe, Middle East, and Africa). For further information, please contact www.rohm.com