Mitsubishi Electric Plans to Merge Power Chip Business with Rohm and Toshiba
N.R. Finch
Mitsubishi Electric is pushing to seal a deal with Rohm and Toshiba by September, merging all three companies' power-semiconductor operations into a single joint venture — one that could claim the world's No. 1 market share, directly challenging Infineon.
Why do these three need to combine?
Power chips — semiconductors that control and convert electricity in cars, data centers, appliances, and nearly every powered device — are a concentrated market: Germany's Infineon alone holds close to one-fifth of global share.
Mitsubishi Electric, Toshiba, and Rohm each sit below 5%. Alone, none can match the R&D and manufacturing scale of the leaders.
This means → the merger logic is "pool enough scale to earn a seat at the table." Only together can the three credibly compete with Infineon and Texas Instruments.
Why are power chips becoming more critical now?
Their core job is managing and converting electricity — from EVs to industrial robots.
As next-generation AI platforms like Nvidia's Vera Rubin push power consumption ever higher, power management is fast becoming a bottleneck for AI infrastructure.
In plain terms = the more compute muscle you add, the more electricity you burn. Whoever manages power efficiently holds a chokepoint in the AI hardware stack.
Where are the talks stuck?
The biggest sticking point is what the new entity will make: Toshiba and Rohm want the JV to also cover converters, drivers, and other analog chips so they can keep existing customers; Mitsubishi Electric wants a pure focus on power chips.
Working-level discussions have stalled, prompting top executives from all three firms to meet in person.
Mitsubishi Electric CEO Kei Uruma put it bluntly: "Endless discussions can only achieve so much. At some point you have to make a formal decision and act."
Why is the subsidy system a sore spot?
Japan's METI requires power-chip firms to commit at least ¥200 billion (≈$12 billion) in cross-company investment to qualify for subsidies — nearly 7× the threshold for other semiconductor projects.
Mitsubishi Electric currently receives zero chip-business subsidies, while startup Rapidus has already secured billions of dollars for advanced-node R&D.
This means → even if the JV launches, without a policy adjustment the Japanese power-chip alliance could still face higher costs than overseas rivals like Infineon.
What determines whether the merger actually happens?
Bloomberg Intelligence analysts call the merger strategically sound: Rohm and Toshiba each hold just 2%–3% of the discrete-semiconductor market — too small to challenge Infineon on their own.
The three parties have reached a preliminary consensus: Mitsubishi Electric will lead the combined entity, targeting expanded sales to automakers, parts suppliers, and industrial clients.
In plain terms = the direction is set. Whether the three can bridge the product-scope gap and formally announce the JV before September is the make-or-break milestone for this consolidation.
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