SK’s Triple Play and Japan’s Subsea Strategy

Why It Matters

SK Hynix’s capacity surge and Japan’s subsea push are critical levers for meeting AI’s exploding data needs, shaping global tech supply chains and geopolitical competition.

Key Takeaways

• SK Hynix plans to triple HBM wafer capacity by 2033‑34.
• SK Hynix’s HBM supply is heavily dependent on Nvidia.
• Nvidia‑SK Hynix relationship is personal, but diversification is sought.
• AI‑driven data traffic pushes big‑tech firms to build own subsea cables.
• Japan leverages full‑stack ecosystem to become regional subsea hub.

Summary

The episode spotlights two parallel AI‑infrastructure trends: South Korea’s SK Hynix accelerating high‑bandwidth memory (HBM) production and Japan’s expanding role in subsea cable networks. SK Hynix’s chairman Chey Tae‑won announced a plan to triple wafer capacity by 2033‑34, underscoring the soaring demand for HBM that powers Nvidia’s AI processors. The company’s close, almost personal, ties with Nvidia raise concerns about over‑reliance, prompting calls for broader customer diversification.

AI’s data‑intensive workloads are also reshaping the undersea cable landscape. Traditional telecom consortia, slowed by permitting and geopolitical hurdles, are giving way to agile, big‑tech‑led projects from Google, Amazon and others that seek guaranteed bandwidth for cross‑border data‑center traffic. Geopolitics, especially tensions in the South China Sea, further complicate route planning, prompting longer but politically safer cable paths.

Notable moments include Jensen Huang’s multiple visits to SK Hynix’s booth and dinner meetings, illustrating the depth of the Nvidia‑SK partnership, and Japan’s Sumitomo embarking on its first subsea cable venture, leveraging a domestic ecosystem that spans operators (NTT), manufacturers (NEC) and trading houses. Government policy frames the sector as a national‑security priority, positioning Japan as a regional hub for both cables and adjacent data‑center services.

The convergence of massive HBM capacity expansion and a rapidly evolving subsea network signals a tightening of AI supply chains. Companies must balance strategic partnerships with diversification, while nations like Japan can capitalize on full‑stack capabilities to capture new revenue streams and bolster digital sovereignty.

Original Description

Welcome to the Tech Latest podcast. Every Tuesday, our tech experts Katey Creel and Shotaro Tani deliver the hottest trends and news from the sector.

In this episode, Katey speaks with Seoul correspondent Kim Jaewon about how SK Hynix continues to benefit from the AI boom, and with Tokyo correspondent Tsubasa Suruga about how rising demand for AI infrastructure is opening opportunities for Japan in subsea cable networks.

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Check out this episode's ⁠⁠⁠⁠featured stories below: ⁠⁠⁠⁠

SK Hynix to triple wafer capacity by 2034: Chairman Chey

https://s.nikkei.com/4es4HxW

Japan seeks bigger role in Asia's subsea cables as AI rewires demand

https://s.nikkei.com/4emJQvX

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