The batteries will be used to help power the AI data centers that SoftBank is developing.
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- SoftBank Group’s mobile unit said it plans to begin large-scale battery cell manufacturing at its plant in Sakai, Osaka Prefecture, to address growing power demand for AI services.
- SoftBank will partner with South Korea’s Cosmos Lab and DeltaX to enable mass production of large-scale battery cells from the fiscal year starting next April.
- The aim is to output energy storage systems at a scale of 1 gigawatt hour per year, which would make it one of the largest facilities in Japan, according to data from BloombergNEF.
- Over the medium term, SoftBank will also look to expand into global markets.
SoftBank is set to launch large-scale battery production aimed at powering its AI data centers, with manufacturing planned at its facility in Sakai, Osaka Prefecture. This initiative will begin in the fiscal year starting April 2027, as SoftBank partners with South Korea’s Cosmos Lab and DeltaX to facilitate mass production of battery cells.
The company aims to produce energy storage systems at a scale of one gigawatt-hour per year, positioning itself as one of the largest battery producers in Japan. This strategic move is a response to the surging power demands associated with AI services, reflecting the broader trend of increasing energy needs in the tech sector.
SoftBank's expansion into global markets is also on the horizon, indicating a significant shift in its operational strategy. The collaboration with Cosmos Lab and DeltaX underscores the importance of international partnerships in achieving these ambitious production goals.
As the demand for AI technologies continues to grow, SoftBank's investment in battery production could play a crucial role in supporting the infrastructure necessary for these advancements.

