Toshiba and ROHM are in serious talks to fold their power semiconductor operations into a single business, a move that could significantly strengthen Japan’s position in the global power electronics arena. The discussions come at a time when demand for efficient power chips is booming across electric vehicles, renewable energy systems and a wide range of industrial applications.
Toshiba and ROHM Explore Power Chip Tie?Up
Japanese media reports say the two companies are looking at moving their respective power semiconductor units into a new joint entity, with several integration models on the table.
One prominent idea is to set up a jointly funded company that would combine Toshiba’s silicon?based power devices with Rohm’s lineup, including its rapidly growing silicon carbide (SiC) business.
For now, the talks are still exploratory, and there is no firm agreement yet on structure, valuation or timelines.
Why the Deal Matters Now
The push to integrate is driven by intensifying global competition in power semiconductors, where European and U.S. players like Infineon and ON Semiconductor currently enjoy much larger market shares.
Reports suggest that in 2024, both Toshiba and ROHM held only mid?single?digit shares of the global market, leaving plenty of room to scale up.
By pooling manufacturing capacity, R&D and product roadmaps, the two companies hope to build the heft needed to better compete in high?growth areas such as EV inverters, charging infrastructure and industrial drives.
Toshiba and Rohm are not strangers to each other. Rohm invested around 300 billion yen in the Japan Industrial Partners (JIP) consortium that took Toshiba private, playing a key role in supporting its restructuring.
The companies also unveiled a major joint investment plan in 2023 to expand production of SiC and silicon power devices, backed by Japanese government support aimed at reinforcing domestic chip supply chains.
Denso Factor and Industry Shifts
These merger talks of Toshiba and ROHM are unfolding against the backdrop of a separate proposal from automotive supplier Denso, which is seeking to acquire Rohm.
A special committee at ROHM is currently reviewing that offer. Industry watchers point out that a combination with Toshiba’s power semiconductor business could give Rohm a different strategic path, potentially boosting its standalone value or changing the dynamics of any future deal with Denso.
Meanwhile, other Japanese industrial players, including Mitsubishi Electric and Fuji Electric, have shown interest in broader consolidation across the country’s power semiconductor sector, highlighting how strategically important this market has become.
How the Companies Are Likely to Position It
Although the current negotiations are being kept under wraps, past statements offer a good sense of how each side may frame the talks.
Toshiba has repeatedly described power semiconductors as a core growth driver and a key tool for strengthening Japan’s industrial competitiveness.
In that context, it is likely to present any integration with Rohm as a way to speed up investment in advanced process technologies, boost capacity for automotive and industrial customers, and shore up the resilience of Japan’s domestic supply base.
Rohm has been clear about its long?term focus on “power and analog solutions” that enable energy savings and miniaturization, with SiC devices at the heart of that strategy.
The company is therefore expected to cast the discussions with Toshiba as a deepening of an existing partnership that can unlock manufacturing synergies across both silicon and SiC, and provide the scale needed to support global OEMs through the EV and renewable energy transition.
Both companies are likely to stress that talks are ongoing and that any final decision will come only after careful consideration of how an integrated power semiconductor platform would benefit customers, shareholders and Japan’s broader position in the global chip ecosystem.
What It Could Mean for Customers and the Market
If a deal goes ahead, Toshiba and Rohm would offer one of the most extensive portfolios of Japan?made power devices, covering discrete components and modules across silicon, SiC and possibly gallium nitride technologies.
For automakers and industrial customers, that could translate into a more unified, reliable supply base and stronger assurance of long?term capacity, especially for next?generation EV and energy infrastructure projects.
At the national level, the move would dovetail with Japan’s efforts to consolidate its semiconductor strengths and secure critical technologies at home.
