Renesas Electronics
Japan's largest maker of microcontrollers and automotive SoCs. It began operating in 2010 from the chip businesses of NEC, Hitachi and Mitsubishi Electric, and has since bought Intersil, IDT, Dialog and Altium.
ルネサスエレクトロニクス・Chipmakers・Last updated: October 22, 2026
Overview
Renesas was established in 2002 as NEC Electronics and started operating as Renesas Electronics in April 2010 after integrating Renesas Technology, the former chip joint venture of Hitachi and Mitsubishi Electric. It is headquartered in Toyosu, Koto, Tokyo.
For the year ended December 31, 2025, Renesas reported revenue of 1,321.2 billion yen, down 2.0%, and a net loss of 51.8 billion yen. The loss came mainly from a 236.6 billion yen charge related to its deposit with Wolfspeed.
Business: Microcontrollers, automotive SoCs, analog and power chips
Why it matters
Main products
- •Automotive SoCs and microcontrollers (R-Car, RH850)
- •General-purpose microcontrollers (RA, RX families)
- •Analog, power and connectivity chips
Sites in Japan
Koto, Tokyo
Hitachinaka, Ibaraki
Kai, Yamanashi
Kumamoto
Fabs operated
- Naka Factory (Hitachinaka, Ibaraki): Microcontrollers and SoCs
- Kofu Factory (Kai, Yamanashi): Power semiconductors (300 mm)
- Kawashiri Factory (Kumamoto, Kumamoto): Front-end wafer fab