Japan and Korea AI Infrastructure: SoftBank, Sakura, SK — 2026-09-09
SoftBank Group moves to refinance its massive OpenAI stake by repaying a $40 billion bridge loan, signaling confidence in its long-term AI infrastructure strategy. Meanwhile, South Korea's "AI for All" initiative faces scrutiny over compute capacity gaps, and Naver advances plans for a 1GW AI factory with Brookfield Asset Management. In Japan, Nikkei reports a surge in data center investment, with projects set to quadruple capacity by 2033.
Japan and Korea AI Infrastructure: SoftBank, Sakura, SK — 2026-09-09
Top developments
SoftBank Refinances OpenAI Stake with $40B Repayment
On September 9, 2026, SoftBank Group announced it will repay the balance on a $40 billion bridge loan used to finance its investment in OpenAI. The conglomerate is moving ahead with plans to refinance the deal with longer-term debt, a move that underscores its commitment to holding significant AI equity stakes while managing near-term liquidity pressures. This financial maneuvering supports SoftBank’s broader "Stargate" and domestic AI data center ambitions, including its planned "AI Data Center GPU Cloud" launch in October 2026.

Naver and Brookfield Discuss 1GW AI Factory in Korea
Naver Corp. is in discussions with Brookfield Asset Management to build a 1-gigawatt (GW) AI factory, with the first phase potentially requiring a $9 billion investment. This collaboration aims to expand Naver’s AI infrastructure beyond its existing Sejong campus, positioning it as a global leader in large-scale AI compute. The project highlights the growing trend of Korean tech giants partnering with global asset managers to fund energy-intensive AI facilities.

South Korea’s "AI for All" Faces Infrastructure Reality Check
A new analysis suggests that South Korea’s "AI for All" initiative, which promises free unlimited AI access to 51 million citizens, may collide with a "wall of reality" regarding compute capacity. While chipmakers benefit from the demand promise, the gap between political ambition and the actual GPU supply chain readiness raises concerns for investors. This skepticism emerges as the country races to deploy national GPU clusters for providers like Naver Cloud, NHN Cloud, and Kakao.

Japan’s Data Center Capacity to Quadruple by 2033
Nikkei Asia reports that Japan’s AI data center capacity is projected to quadruple by 2033, driven by approximately $60 billion in new investments. This expansion aims to place Japan among the top global tiers alongside the US and China. Key players like SoftBank, Sakura Internet, and KDDI are central to this growth, leveraging METI subsidies to build out domestic GPU clouds and secure critical compute resources.

Local view
Samsung SDS Pivots from AI Narrative to Execution Local Korean media reported that Samsung SDS unveiled its "Multidimensional AI Full Stack" strategy at the REAL Summit 2026. CEO Lee Jun-hee emphasized strategic investments in AI, robotics, and logistics, aiming to bridge the gap between high AI adoption rates (88%) and low profit contribution (6%). LS Securities maintained a "Buy" rating on Samsung SDS with a target price of 307,000 KRW, citing this shift toward tangible execution.

Vietnam Courts SK Group for AI Manufacturing Hub A high-level delegation from Vietnam’s Phu Tho province visited South Korea to court SK Group for investment in an advanced industrial hub. The delegation sought to leverage SK’s existing presence in Vietnam to attract further capital into semiconductor and AI manufacturing sectors. This move highlights the regional competition for AI infrastructure investments, as neighboring countries vie for SK’s expanding footprint.
Context & numbers
- Japan Investment Target: Japan aims to attract over 370 trillion yen (~$2.3 trillion) in combined public and private investment through fiscal year 2040, with AI data centers being a key pillar.
- Korea Capacity: Tracked AI data-center projects show South Korea filling out the top tier of global capacity, following the US, Canada, and UAE.
- SoftBank Stock Rally: SoftBank shares surged 12% recently, driven by optimism around Arm’s AI outlook and the company’s record retail bond issuance, reaching a market cap of €175 billion.
On the radar
- SoftBank GPU Cloud Launch: SoftBank Corp. is scheduled to launch its "AI Data Center GPU Cloud" powered by "Infrinia AI Cloud OS" in October 2026. This service is part of its neocloud business strategy and will utilize domestic Japanese infrastructure.
- Stargate Korea Stalls: Reports indicate that OpenAI’s Stargate Korea data center plans are stalling due to unresolved power supply and funding hurdles, nearly a year after the initial announcement.
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