Mitsubishi Electric Corp, Toshiba Corp, and Rohm Co have announced the signing of a memorandum of understanding to begin discussions on merging their power semiconductor businesses [1]. The talks aim to combine the strengths of Rohm and Toshiba in vehicle power chips with Mitsubishi Electric's expertise in industrial-based power semiconductors [1]. This integration is expected to create a globally competitive business in both scale and technology, according to a Mitsubishi Electric press release [1].
The merger is seen as a strategic response to potential takeover efforts by Denso Corp., which agreed in September 2024 to consider a semiconductor partnership with Rohm and subsequently acquired a 5 percent stake in the Kyoto-based chipmaker [1]. Denso was reportedly considering a tender offer to acquire all remaining Rohm shares, prompting deeper cooperation among Mitsubishi Electric, Toshiba, and Rohm [1].
Rohm stated that the merger could expand product line-ups, accelerate the creation of new products, and reduce costs through factory consolidation [1]. The Japanese government has been encouraging domestic chip industry consolidation to boost market share and recognition, especially as demand for electric vehicles declines and Chinese firms gain dominance [1].
As of 2025, the combined global market share of Mitsubishi Electric, Toshiba, and Rohm in power semiconductors stands at 11 percent, making them the second-largest player behind Germany's Infineon Technologies AG, which holds a 24 percent share [1]. A Toshiba executive emphasized that integration would significantly enhance the companies' collective capabilities [1].
CONCLUSION
The merger talks between Mitsubishi Electric, Toshiba, and Rohm signal a major consolidation in the power semiconductor sector, positioning the group as a formidable global competitor. The move is expected to strengthen their market presence, drive innovation, and counter takeover threats, with significant implications for the Japanese chip industry.