Three of Japan’s biggest names in power semiconductors — Rohm, Toshiba, and Mitsubishi Electric have signed a memorandum to explore combining their businesses into a single entity. If the deal goes through, the merged company would hold roughly 11% of the global power semiconductor market, placing it second only to Germany’s Infineon Technologies.
With rapidly changing technological page and growing competitive forces, the logic is straightforward since none of the three can individually keep pace with the capital demands or market scale that the sector now requires. Power semiconductors sit at the heart of EVs, renewable energy systems, industrial automation, and data centers, all fast-growing segments where Japanese firms have been losing ground to larger, more integrated global players.
Each brings a distinct edge. Rohm has deep silicon carbide expertise for EV inverters and charging infrastructure. Mitsubishi Electric brings industrial power capability. Toshiba contributes its device portfolio post its memory spinoff to Kioxia. Pooled, the three could meaningfully cut costs and accelerate technology development.
