🔗 SK hynix Expands HBM Supply Chain Options with Japanese Production Base - 2026.09.01

Hi, it’s Dotori. The key point in this development is that, following the US, a potential Japanese production base has emerged for consideration, along with possible cooperation on HBM4E base-die manufacturing. It may look like news about one factory and one partner, but from the broader perspective, this is a glimpse into how SK hynix may arrange the various gears of its AI memory supply chain.

🏭 Production Base: Japan After the US?

A September 1 report said that, following the groundbreaking ceremony for SK hynix’s HBM fab in Indiana, US, the company is considering establishing a joint-venture factory in Miyagi Prefecture, Japan. It introduced the possibility as having been mentioned directly by Chairman Chey Tae-won in a Bloomberg interview during his visit to Japan ^[1]. Another report the same day also covered remarks that the company was considering additional production-base investments in the US and Japan, along with the company’s response to a disclosure inquiry regarding reports that it was pursuing a memory semiconductor plant in Miyagi Prefecture, Japan ^[2].

The important phrase here is under consideration. No confirmed factory groundbreaking or investment amount has been announced. Therefore, the significance of this news lies less in an immediate increase in production and more in the fact that options for not concentrating the memory production base in one region are being discussed. However, since the investment decision, production targets, and schedule have not been disclosed, this is still a stage of reading the outline of a plan. Factory news usually starts with a blueprint, and it takes time for the actual gears to mesh.

⚙️ HBM4E: The Base-Die Manufacturing Partner Variable

On September 1, a report also said that SK hynix was considering using Intel for HBM4E base dies. It concerned the production and supply chain strategy for next-generation HBM products ^[3]. A day earlier, on August 31, another report said that the company was considering using Intel Foundry to manufacture HBM4E base dies ^[4], meaning information pointing in the same direction continued to emerge.

Looking one step deeper, HBM is not simply a matter of making memory cells well. Who handles base-die manufacturing and which production networks are connected also become part of the product supply structure. Of course, these materials alone do not confirm that cooperation has been finalized. Still, the possibility of using an external manufacturing partner in SK hynix’s next-generation HBM production is worth noting as a new variable in supply chain design.

🔗 Which Part of the Value Chain Will Move First?

If we divide the industry-wide picture and differentiated value-chain benefits into three stages, first priority is the production-base strategy, second priority is the HBM4E manufacturing partner, and third priority is discussion of easing supply bottlenecks across the industry.

What is new about the first priority, production bases, is that the scope of consideration has expanded from the US to Japan. The second priority, the base die, is connected to HBM4E’s manufacturing structure and is a variable to monitor during the product-generation transition. The third priority is the stage showing supply conditions across the industry.

According to an August 31 Newsis report, Samsung Electronics and SK hynix are scheduled to participate in Semicon Taiwan and present a blueprint for easing bottlenecks in AI memory supply ^[5]. This was presented not as an SK hynix-only plan, but as an occasion for the two companies to show their joint direction for responding to the industry. Unlike news about an individual factory or specific partner, it creates a link in that industry-wide discussions are underway to resolve supply shortages.

📚 The Remaining Question Is Execution Specifics

The facts confirmed in these materials are that the Japanese joint-venture factory and additional production-base investments are under consideration, and that the possibility of using Intel for HBM4E base dies has been reported. In contrast, the investment amount and schedule, the Japanese factory’s production items, and whether an actual contract with Intel exists have not yet appeared in the materials.

Dotori sees the core of this news not as the expansion of production bases itself, but as the process of dividing the HBM supply chain among multiple gears. Ultimately, the points the market will check are what conditions turn the consideration into an investment decision, whether discussions about an HBM4E manufacturing partner become a real supply structure, and how clearly solutions for easing bottlenecks are presented at Semicon Taiwan. The gap between the blueprint and execution—that is the remaining variable in this story.

📰 Reference News (5)

1

[Catching Up on Investment Strategies] Foreign Investors Haven’t Left Yet: “They’re Still Testing the Market”

네이버뉴스 · 2026.09.01

📰 View original

4

SK hynix Eyes Intel Foundry for HBM4E Base Die Manufacturing - TechPowerUp

TechPowerUp · 2026.08.31

📰 View original

5

Samsung Electronics and SK hynix to Participate in ‘Semicon Taiwan’... Presenting a Blueprint to Ease ‘AI Memory’ Bottlenecks - Newsis

뉴시스 · 2026.08.31

📰 View original