Competition Intensifies for SK Hynix, Samsung, and TSMC to Move Production to US and Japan Amid Tariff Pressure

Executive Summary

SK Hynix's consideration of investing in Japan stems from a confluence of three drivers: US onshoring pressure linked to tariffs, Japanese local governments' strategies to attract semiconductor investment, and the need to expand production capacity to meet AI demand. The decision is delayed within a triangular approval framework involving the intertwined interests of Tokyo, Washington, and Seoul. The most likely scenario is a stalemate (50% probability), with consideration ongoing but a final announcement postponed. A pessimistic scenario (30% probability) where companies return to China due to the paradoxical effects of tariff policy is also a significant possibility. The South Korean government should enhance predictability by shifting from its rigid approval stance, driven by technology leak concerns, to a conditional, phased approach. Companies need to manage risk by keeping options open in both the US and Japan, while tying the start of construction to the finality of tariff negotiations. Moreover, given the technological pursuit by Chinese memory firms like CXMT, South Korea's current bottleneck advantage in HBM and foundry services should not be treated as a permanent structural achievement.

I. Analysis of the Current Situation

Intensifying Competition for SK Hynix, Samsung, and TSMC to Move Production to US and Japan Amid Tariff Pressure: Analysis of the Current Situation

1. Background and Developments

SK Group Chairman Chey Tae-won visited Sendai, Miyagi Prefecture, on August 31 for a meeting of the heads of the Korea-Japan Chambers of Commerce and Industry. On this occasion, Chairman Chey told Bloomberg News that the company is considering investing in a semiconductor plant in Japan. "We are looking all over Japan," he said, adding, "We are considering any place that has abundant electricity and water" [1]. He deferred a definitive answer on the specific site or investment scale, stating, "We will let you know as soon as we finish our review" [1].

Miyagi Prefecture is already actively seeking to attract SK Hynix. The local government near Sendai has been independently pursuing the establishment of a state-of-the-art SK Hynix memory plant, separate from its lobbying efforts in the United States. However, this plan faces two main obstacles. The first is competing lobbying from Washington, as the United States is also making moves to attract a new SK Hynix production line [8]. The second is Seoul's cautious attitude. The South Korean government maintains a prudent stance on approving new overseas production facilities due to concerns about technology leaks [8]. Thus, Chairman Chey's remarks about considering investment in Japan are less an autonomous corporate decision and more a reflection of a dynamic involving three simultaneous factors: the competitive bids from the US and Japan, and the approval process of the South Korean government.

These moves are not limited to SK Hynix. After Micron and TSMC, SK Hynix is now cited as the third foreign semiconductor company considering a move into Japan [5]. This is driven by the Japanese government's policy to attract the semiconductor industry. Japan's strategy for self-sufficiency in advanced semiconductors, epitomized by the Rapidus project, serves as a platform to absorb local investment from foreign firms. Concurrently, Japanese materials and components companies are strengthening their ties with Taiwan. Ajinomoto and Daikin Industries are expanding their supply of semiconductor materials within Taiwan, deepening their integration into the TSMC ecosystem [11][13]. This indicates that Japan is pursuing a dual strategy: attracting finished-product foundries while also reinforcing its materials and components supply chain.

2. Current Situation

The pressure from the United States takes the form of a combination of tariffs and onshoring incentives. The Office of the US Trade Representative (USTR) has repeatedly conveyed the message that an "America First trade policy raises wages and reshores jobs" during a factory visit in Iowa [12]. TSMC has already committed to an investment of up to $165 billion for as many as six fabs in Arizona, which stands as the largest single-project foreign direct investment in history [6]. This investment by TSMC is setting a precedent, leading to similar onshoring pressure on SK Hynix and Samsung Electronics.

However, there are also suggestions that US tariff policy itself could lead to unintended consequences. The Peterson Institute for International Economics (PIIE) notes that the combination of the Trump administration's planned next tariffs on 16 trading partners and an agreement to ease tariffs on "non-sensitive" Chinese goods could paradoxically result in sending companies back to China [2]. In a separate analysis, PIIE assesses that tariffs on China, despite being implemented for several years, have failed to meaningfully reduce US dependence on Chinese suppliers. The tariffs have merely altered trade routes, with Chinese-origin content continuing to flow into the US via third countries when measured on a value-added basis [9].

Meanwhile, responding to the weak yen has emerged as a separate domestic issue in Japan. It was belatedly disclosed that US Treasury Secretary Bethune stated in a meeting with Bank of Japan Governor Kazuo Ueda on August 30 that she "strongly supports Japan taking decisive market and financial policy measures to counter the significant undervaluation of the yen" [DELETED SOURCE]. This indicates that currency and trade issues are proceeding concurrently between the US and Japan, separate from the pressure for semiconductor onshoring.

The China variable is another factor complicating the current situation. The Global Times reported that China's largest DRAM manufacturer, ChangXin Memory Technologies (CXMT), has taken a global lead in next-generation LPDDR6 mobile memory. Citing the Chosun Ilbo, the report noted that South Korean investors were closely watching the stock prices of Samsung Electronics and SK Hynix when the market reopened on Monday [19]. A Chinese observer interpreted this reaction in the South Korean market as demonstrating "where the competitive pressure in the memory market is now coming from" [19]. This means that SK Hynix and Samsung Electronics are simultaneously facing competition over US and Japanese production sites and a second front of technological pursuit by Chinese latecomers.

3. Key Actors and Positions

SK Group (Chairman Chey Tae-won)is taking a cautious approach, publicly considering investment in Japan but holding off on a final announcement [1]. By stating that it is not tied to any specific region and will base its decision on site conditions such as power and water supply, the group has opened up a competitive bidding situation among multiple candidate sites, rather than a sole bid from Miyagi Prefecture [1].

Miyagi Prefecture and Japanese Local Governmentsare actively trying to attract SK Hynix, a move that also serves as a tool for regional economic revitalization linked to the central government's semiconductor self-sufficiency strategy. The problem is that Washington has already entered this competition as a rival bidder [8].

The South Korean Governmenthas maintained a passive stance on approving new overseas production facilities, citing concerns about technology leaks [8]. This is a tangible variable constraining the speed of SK Hynix's overseas investment decisions. It represents a point of conflict between the corporate need for global production diversification and the policy goal of protecting domestic technology.

The US Government (USTR, Department of the Treasury)is employing a dual-track approach, using tariffs as leverage to pressure for reshoring while also demanding cooperation on currency policy in specific cases [12] [DELETED SOURCE]. The precedent of TSMC's Arizona investment creates a strong incentive to apply similar pressure on South Korean companies [6].

TSMChaving already made large-scale investments in the United States, is simultaneously expanding into the Baifu Industrial Park in Kaohsiung and building an advanced packaging cluster within Taiwan [15]. This demonstrates the principle held by the Taiwanese government and industry that expanding overseas production does not replace the maintenance of core processes in Taiwan. Taiwan's President Lai Ching-te has also politically emphasized keeping advanced processes in Taiwan, noting that Nvidia's annual investment and procurement in the country exceeds $94 billion [17].

Chinese Firms (CXMT, etc.)have emerged as a third axis, challenging the bottleneck position of South Korean companies through their technological catch-up in memory semiconductors [19]. While South Korea and Taiwan's overtaking of Japan in exports is a structural achievement stemming from their dominance of the HBM and advanced foundry bottlenecks, the fact that China's semiconductor exports surged by 99.5% during the same period suggests that this bottleneck advantage may not last indefinitely [3][7].

4. Key Issues

The first issue is the locus of approval authority. Whether SK Hynix invests in Japan ultimately depends on passing the South Korean government's review for technology leaks [8]. If the company's market judgment conflicts with the government's security assessment, the timing of the investment itself could be delayed.

The second issue is the direction of the US-Japan competition to attract investment. With both Washington and Miyagi Prefecture targeting SK Hynix, the final site selection extends beyond simple production cost calculations to become a matter of managing relations with both governments [8].

The third issue is the effectiveness of the tariff policy. If, as PIIE's analysis suggests, tariffs on China fail to achieve actual supply chain restructuring and only reroute trade [9], there is a risk that South Korean companies' onshoring investment decisions may not yield the expected benefits of securing access to the US market.

The fourth issue is competitive pressure from China. CXMT's lead in LPDDR6 is being interpreted as a sign that the technological superiority of the South Korean memory industry is not absolute [19]. While discussions on production diversification focus on onshoring in the US and Japan, the separate front of the catch-up by Chinese latecomers cannot be ruled out as being neglected.

II. In-Depth Issue Analysis

Intensifying Competition for SK Hynix, Samsung, and TSMC to Move Production to US and Japan Amid Tariff Pressure: In-Depth Issue Analysis

1. Analysis of Root Causes

The root cause of this situation is not singular. On the surface, the onshoring pressure linked to the Trump administration's tariffs is cited as the cause. However, a closer look at the actual dynamics reveals that it is more the result of three independent drivers coincidentally converging at the same time.

The first driver is US tariff policy. The USTR repeated the message during a tour of Iowa that an "America First trade policy raises wages, reshores jobs, and restores America's global competitiveness" [12]. This message is largely domestic political rhetoric. However, backed by the tangible result of TSMC's $165 billion investment in Arizona, it serves as a basis for extending similar pressure to other semiconductor companies [6].

The second driver is the Japanese government's strategy to attract semiconductor investment. Japan's policy for self-sufficiency in advanced semiconductors, symbolized by the Rapidus project, is an industrial policy that was already underway, independent of tariffs. The trend of Micron and TSMC entering Japan first, with SK Hynix now being discussed as the third case, stems largely not from US pressure but from the active recruitment efforts of Japanese local governments [5]. Miyagi Prefecture has been moving independently to attract SK Hynix [8].

The third driver is the production capacity shortage due to the surge in demand for AI semiconductors. DigiTimes Asia reported that SK Hynix is "actively exploring manufacturing and investment options in Japan to meet the soaring demand for memory chips driven by AI" [5]. This is not for the purpose of tariff avoidance but is driven by a pure need to expand production capacity. As these three drivers have coincidentally converged at the same time, the media and the market tend to simplify this into a single narrative of "tariff-driven onshoring."

2. Structural Context

Political Structure: A Triangular Approval System

SK Hynix's investment in Japan is not a unilateral corporate decision. The Nihon Keizai Shimbun reported that Miyagi Prefecture's attempt to attract SK Hynix is "colliding with similar lobbying activities from Washington and Seoul's reluctance to approve new overseas facilities due to concerns about technology leaks" [8]. This means that SK Hynix's decision on an overseas production base is effectively situated within a triangular approval structure where the interests of the Tokyo, Washington, and Seoul governments are simultaneously intertwined.

From the South Korean government's perspective, preventing the overseas leakage of semiconductor technology is both an industrial and a national security policy. This is why it maintains a conservative attitude toward approving new overseas fabs [8]. In contrast, Japanese local and central governments, tasked with the national goal of rebuilding their semiconductor industry, are proactive in attracting foreign companies. The United States needs the tangible outcome of securing domestic production bases as a result of its tariff policy. SK Hynix's final decision is being delayed at the point where the goals of these three governments conflict.

Economic Structure: The Potential Shift in Bottleneck Status

In the first half of 2026, South Korea and Taiwan surpassed Japan in export value for the first time, with South Korea at $496.3 billion and Taiwan at $416.6 billion, compared to Japan's $384.4 billion [3][7]. This is because South Korea and Taiwan control the two bottlenecks of HBM and advanced foundries [7]. However, this bottleneck status is not permanent. China's semiconductor exports surged by 99.5% during the same period, and ChangXin Memory Technologies (CXMT) was recently reported to have taken the global lead in next-generation LPDDR6 memory [19]. The Global Times reported that South Korean investors are closely watching the stock performance of Samsung Electronics and SK Hynix in response to CXMT's "performance surprise" [19].

This structure explains why SK Hynix and Samsung Electronics are anxious to expand their production capacity. Underlying their investment expansion is a sense of crisis that if they fail to maintain their current bottleneck position, China's internalization of legacy and mid-range memory production could erode their revenue base [7]. At the same time, Japan is avoiding being left out of the AI boom by maintaining its superiority in materials and components rather than finished chips [3]. The strengthening ties of Ajinomoto and Daikin Industries with Taiwan illustrate this point [11][13].

Security Structure: Technology Leaks and Dual Geopolitical Exposure

The South Korean government's cautious stance on approving overseas fabs is based on concerns about technology leaks [8]. However, at the same time, South Korean companies are also exposed to risks in the Taiwan Strait. Concerns have already been raised that the reliance on TSMC for production could act as a single geopolitical point of failure [7]. In other words, the South Korean semiconductor industry is under a dual constraint, needing to simultaneously satisfy the conflicting demands of preventing domestic technology leaks and diversifying its overseas supply chain.

3. Historical Precedents and Comparison of Similar Cases

TSMC's investment in Arizona is a direct precedent for the current cases involving SK Hynix and Samsung Electronics. Starting in 2020, the United States offered incentives to encourage TSMC to build its Arizona fab [6]. The Council on Foreign Relations (CFR) describes this process as the result of "US efforts to reduce its dependence on Taiwan" [6]. TSMC's investment subsequently expanded to as many as six fabs with a cumulative value of $165 billion, marking the largest-ever foreign direct investment for a single project [6]. This precedent shows that incentives combining tariffs and subsidies can indeed lead a Taiwanese company to expand production within the United States.

However, PIIE's analysis creates a crack in this success narrative. It argues that years of tariffs on China have "largely failed to reduce dependence on Chinese suppliers" [9]. The analysis suggests that the route for Chinese-origin content to enter the US embedded in imports via third countries has actually expanded [9]. This serves as a precedent showing that attempts to restructure supply chains through tariffs do not always produce the intended results. In a separate piece, PIIE points out that the combination of the Trump administration's next tariff measures and an agreement to ease tariffs on "non-sensitive" Chinese goods could paradoxically drive companies back to China [2].

Japan's successful cases of attracting foreign companies include TSMC's Kumamoto plant, followed by Micron's investment in Hiroshima [5]. The investment being considered by SK Hynix is cited as the third case in this lineage [5]. In the previous two cases, the Japanese government used the Rapidus project as a vehicle to combine subsidies with infrastructure support. Miyagi Prefecture's approach to SK Hynix follows a similar local government-led attraction model [8].

4. Key Variables in the Issue's Development

The first variable is whether the South Korean government will approve the overseas fab. If Seoul continues to maintain its passive stance due to concerns about technology leaks, SK Hynix's investment in Japan could remain at the level of Chairman Chey's remarks for an extended period [8]. Conversely, if the approval process is relaxed, Miyagi Prefecture's bid could make substantial progress.

The second variable is the direction of US tariff policy toward China. As PIIE pointed out, if the next round of tariffs proceeds simultaneously with tariff relief for certain Chinese goods, the very calculus for companies' production site decisions could be shaken [2]. A contradictory policy environment, where onshoring pressure intensifies while incentives for China-based detour routes remain, could act as a factor delaying companies' long-term investment decisions.

The third variable is the pace of technological catch-up by Chinese memory companies. If CXMT's success with LPDDR6 proves to be a sustained trend rather than a one-off event [19], South Korean companies may shift their capacity expansion priorities from securing new overseas bases to defending their existing technological lead. This variable would directly impact the speed and scale of their investment reviews for Japan and the United States.

The fourth variable is the outcome of the competition to attract investment among Japanese local governments and between the United States and Japan. In the current dynamic where both Miyagi Prefecture and Washington are approaching SK hynix [8], which side ultimately offers more favorable terms will likely have a substantial impact on the decision of where to invest.