SK Hynix eyes billions in Japan memory chip plant — but no decision yet

South Korean memory chip giant SK Hynix is exploring the possibility of building a semiconductor fabrication plant in Japan's Miyagi prefecture, with potential investments reaching tens of billions of dollars. The news, first reported by the South Korean newspaper Hankyoreh and confirmed by Reuters, marks a rare potential move by a Korean chipmaker into Japan's manufacturing landscape.

However, the company has stressed that no final decision has been made. "Any location with the necessary infrastructure can be considered as a potential site," SK Hynix told Reuters. The firm's parent group, SK Group, recently saw its chairman Chey Tae-won visit the region, fueling speculation about the project's seriousness.

The public disclosures do not specify the scale of the facility, the type of memory chips to be produced, construction timelines, the manufacturing process node, or the terms of any potential government subsidies. If the project moves forward, it would represent the first major manufacturing investment by a South Korean chipmaker in Japan.

The type of memory produced is particularly critical for the AI market: modern accelerators rely on High Bandwidth Memory (HBM), a specialized product where SK Hynix is a leading supplier. However, the company has not confirmed whether HBM would be manufactured at the Miyagi site. As a result, the potential factory cannot yet be considered a confirmed source of future HBM supply, despite its significance for the global AI chip supply chain.