Divergent Geopolitics: South Korea and Japan's Indo-Pacific Strategies

The unfolding US Indo-Pacific strategy, particularly with the prospect of a second Trump administration, is marked by a complex duality. While mainstream Washington circles prioritize geopolitical competition with China and advocate for a 'lattice-like security' connecting allies, signs suggest a potential weakening of the strategy's military focus. Trump's past rhetoric about Taiwan as a 'negotiating chip' and his administration's inclination towards economic competition and compromise over military deterrence indicate a shift. This creates a confusing landscape where the strategy's continuation is debated alongside its potential disappearance, increasing uncertainty about US-China relations and the future East Asian order.

“

The current US Indo-Pacific strategy is in a dual state where President Trump's priorities and the institutional inertia of the bureaucracy coexist.

In response, Japan remains proactive in pursuing 'integrated deterrence' against China. It emphasizes geopolitical connectivity, participating actively in military exercises with the US, Philippines, and Australia, and signing logistics support agreements. Japan's geopolitical thinking is deeply rooted in its historical perception of the Korean Peninsula and Taiwan as its 'line of interest' since the Meiji era. Even after World War II, this order, bolstered by US power, largely persisted. China's rise reawakens these historical memories, framing the potential emergence of a China-centric order as a threat to Japan's long-standing interests, making it react more urgently to any perceived wavering in US strategy.

South Korea shares concerns about a US retreat and the expansion of Chinese influence. However, its historical experience and geopolitical position differ significantly from Japan's. Historically, China has been a complex entity for Korea, requiring both deterrence and adaptation, rather than solely confrontation. Crucially, South Korea is on the front lines of geopolitical competition where major power spheres overlap. Unlike Japan, it lacks the geographical buffer to utilize adjacent countries as a 'line of interest' for its own security.

“

Japan's geopolitical thinking has deep historical roots. Since the Meiji era, Japan has perceived the Korean Peninsula as its 'line of interest' for security.

Therefore, South Korea's realistic approach should involve strengthening cooperation with the liberal bloc while focusing on 'soft balancing.' This entails prioritizing collaboration in advanced technology, supply chains, and defense industries over military alliances against China. In this era of shifting orders, numerous strategic concepts will proliferate. Understanding the geopolitical thinking of other nations is important, but establishing South Korea's own strategic perspective is paramount. The goal should be to prevent both a drastic US withdrawal and hegemonic Chinese dominance, pursuing managed competition and stable coexistence – the realistic direction for South Korean geopolitics today.

“

Therefore, it is realistic for South Korea to pursue 'soft balancing,' focusing on advanced technology, supply chains, and defense industry cooperation, rather than military anti-China alliances.