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ROHM

A Kyoto-based chipmaker focused on power and analog semiconductors and one of the early movers in silicon carbide (SiC), from wafers to devices. It owns German SiC wafer maker SiCrystal.

ローム・Chipmakers・Last updated: October 22, 2026

Overview

ROHM was established in September 1958 and is headquartered in Kyoto. It acquired SiCrystal, a German SiC wafer supplier, in 2009, which gives it an in-house supply of SiC substrates.

It produces SiC power devices at ROHM Apollo's Chikugo plant in Fukuoka and, from 2024, at LAPIS Semiconductor's Miyazaki No. 2 plant in Kunitomi, a former solar panel factory. For the year ended March 2026 it reported sales of 481.1 billion yen and a net loss of 158.4 billion yen after a 193.6 billion yen impairment, mostly on SiC equipment, as EV demand grew more slowly than planned.

Business: SiC and silicon power devices, analog ICs

Why it matters

SiC power devices raise efficiency in EV inverters and chargers; ROHM's results show how sensitive this business is to the EV cycle.
Its SiC plants in Fukuoka and Miyazaki add to the Kyushu semiconductor cluster.

Main products

  • •SiC MOSFETs and Schottky diodes
  • •Silicon power devices and discretes
  • •Analog and power management ICs
  • •LEDs and optical devices

Sites in Japan

Head officeHeadquarters

Kyoto, Kyoto

ROHM Apollo Chikugo plantPlant

Chikugo, Fukuoka

LAPIS Semiconductor Miyazaki No. 2 plantPlant

Kunitomi, Miyazaki

Fabs operated

  • Miyazaki No. 2 Plant (Kunitomi, Miyazaki): SiC power semiconductors
  • ROHM Apollo Chikugo Plant (Chikugo, Fukuoka): SiC power devices

Related pages

Sources

  1. ROHM corporate profile (PDF)
  2. ROHM: acquisition of the former Solar Frontier Kunitomi plant
  3. ROHM financial results release (May 12, 2026)
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