By R Chandrakanth
New Delhi. A fresh suspected missile launch on April 8 by North Korea toward Japan has once again put East Asia on edge. It has revived fears of escalation in one of the world’s most heavily militarised regions. The incident, which reportedly triggered Japan’s emergency alert systems, is not an isolated provocation but part of a broader pattern of strategic signalling.
These constant threats are increasingly shaping regional and global security dynamics. At the heart of the issue lies Pyongyang’s accelerating missile and nuclear weapons programme under leader Kim Jong Un. Over the past few years, North Korea has significantly advanced its ballistic missile capabilities, including systems that can potentially reach targets across Japan and even beyond.
While the regime frames these tests as defensive, their trajectory, often toward or over Japanese territory, creates real security concerns and raises the risk of miscalculation. Each launch forces Japan to respond, activating civil defence protocols and reinforcing a sense of vulnerability among its population.
Japan Recalibrating its Defence Policy
The implications are already reshaping Japan’s own strategic posture. Long bound by a pacifist constitution, Tokyo has begun recalibrating its defence policy, increasing military spending and exploring counterstrike capabilities. This marks a notable departure from decades of restraint and reflects a growing recognition that the regional security environment is deteriorating. For neighbouring countries, however, Japan’s shift also introduces new uncertainties, adding another layer to an already complex geopolitical equation.
The current tensions cannot be understood in isolation from the broader power dynamics in East Asia. The region has become a central arena for rivalry between the United States and China. While North Korea maintains a close, albeit complicated, relationship with China, the United States has strengthened its alliances with Japan and South Korea through joint military exercises and strategic coordination. These drills, seen by Pyongyang as direct provocations, often trigger retaliatory missile tests, creating a cycle of action and counteraction that keeps the region in a near-constant state of tension.
The Taiwan Connection
Adding to the volatility is the issue of Taiwan, where rising cross-strait tensions have heightened the strategic stakes for all major players. Any conflict involving Taiwan would have immediate repercussions across East Asia, drawing in the United States and potentially reshaping regional alliances overnight. In this context, North Korea’s actions serve as both a distraction and a pressure point, complicating an already fragile balance.
Beyond regional concerns, the latest missile scare underscores a more troubling global trend: the increasing fragility of the international security order. The world is currently grappling with multiple, overlapping crises, from the ongoing Russia-Ukraine War to persistent instability in the Middle East. Unlike earlier periods where conflicts were more geographically contained, today’s geopolitical landscape is marked by simultaneous flashpoints that can influence one another in unpredictable ways.
Erosion of Arms Control Frameworks
Compounding the problem is the gradual erosion of arms control frameworks and diplomatic mechanisms that once helped manage such tensions. Trust between major powers is at a low ebb, and multilateral institutions are struggling to respond effectively. At the same time, rapid advancements in military technology, from hypersonic weapons to sophisticated missile defence systems, are compressing decision-making timelines, increasing the risk that a misstep could escalate into a larger conflict.
Domestic political considerations are also playing a role. Leaders across several countries are adopting more assertive foreign policies, often driven by internal pressures or the need to project strength. In North Korea’s case, missile tests serve not only as a tool of international bargaining but also as a means of reinforcing regime legitimacy at home.
Taken together, the suspected missile launch toward Japan is more than a regional security incident, it is a reflection of a world entering a more contested and uncertain phase. As great-power competition intensifies and traditional guardrails weaken, the risk is not just of isolated crises, but of cumulative instability that could redefine the global order in the years ahead.
North Korea’s Missile Arsenal
North Korea’s missile arsenal is largely organised under the Hwasong (Mars) series, supplemented by KN-designated systems and emerging hypersonic platforms. These are designed for nuclear delivery to long-range targets, including the US mainland. The missiles include Hwasong-14 (the first proven ICBM in 2017), Hwasong-15 (an extended-range ICBM), Hwasong-17 (a very large ICBM, potentially capable of carrying multiple warheads), Hwasong-18 (a solid-fuel ICBM with faster launch readiness), and next-generation systems such as Hwasong-19/20, with Hwasong-20 showcased in 2025 as a “most powerful nuclear strategic weapon,” possibly MIRV-capable. These form the backbone of North Korea’s strategic nuclear deterrent.
Intermediate-Range Ballistic Missiles (IRBMs), designed for regional nuclear strike roles such as targeting Guam and Japan, include the Hwasong-12 and Hwasong-16A/16B, which incorporate hypersonic glide vehicle testing. Short-Range Ballistic Missiles (SRBMs) and tactical nuclear systems are becoming increasingly important for battlefield nuclear use; these include the Hwasong-11 series (KN-23/24/25 variants), which are highly manoeuvrable quasi-ballistic missiles, as well as the Hwasong-11E linked to hypersonic payload experimentation, KN-24 (ATACMS-like), and KN-25 (a large-calibre rocket system). These are believed to be paired with tactical nuclear warheads such as the Hwasan-31 concept.
Submarine-Launched Ballistic Missiles (SLBMs) include the Pukkuksong-1, Pukkuksong-3, Pukkuksong-4, and Pukkuksong-5 series, providing a second-strike capability. North Korea is also reportedly testing long-range strategic cruise missiles for potential nuclear delivery roles. In addition, it has tested hypersonic weapons on Hwasong-16 variants and is working on future systems, including MIRV-capable ICBMs (multiple warheads), solid-fuel next-generation ICBMs, and nuclear-capable anti-satellite and other advanced delivery systems.
Japan, a non-nuclear weapon state
Japan is officially a non-nuclear weapon state, but it is widely considered a “threshold” or “latent nuclear power.” Its legal position is guided by the Three Non-Nuclear Principles (no possession, no production, and no introduction of nuclear weapons). Ironically, it remains the only country to have suffered atomic attacks, during the Hiroshima bombing and Nagasaki bombing. Japan relies on the US nuclear umbrella under the US–Japan alliance.
Japan has one of the most advanced civilian nuclear industries in the world, giving it rapid weaponisation potential if it ever chose to pursue that path. It possesses a large stockpile of plutonium (civilian, reactor-grade), advanced fuel cycle technology, and highly sophisticated space and missile capabilities.
Japan’s ground forces are highly trained and maintain a defensive posture, with a focus on island defence and rapid deployment. The Japan Maritime Self-Defense Force is one of the world’s most capable navies, equipped with advanced destroyers, submarines, and helicopter carriers that effectively function as quasi-aircraft carriers. The Japan Air Self-Defense Force operates F-15 fighters and F-35 stealth jets, supported by integrated air and missile defence systems.
Japan is undergoing a major strategic shift, marked by the acquisition of long-range strike capabilities, the development of a next-generation fighter under the Global Combat Air Programme (GCAP) in collaboration with the UK and Italy, and the strengthening of missile defence systems in response to evolving threats from North Korea and China.
Japan–China tensions are also deep-rooted and multi-dimensional. There are territorial disputes over the Senkaku/Diaoyu Islands, with frequent standoffs between coast guard and naval vessels, making it one of the most dangerous flashpoints in Asia. China’s rapid military rise under the People’s Liberation Army is a major concern for Japan, alongside increased Chinese naval activity near Japanese waters and regular airspace incursions that lead to frequent Japanese fighter scrambles.
The Taiwan factor adds another layer of complexity. Japan views stability in Taiwan as critical to its own security, and any China–Taiwan conflict would directly impact Japan, particularly regions such as Okinawa. Lingering tensions from World War II, including the Second Sino-Japanese War, and disputes over wartime memory and historical narratives continue to affect diplomatic relations.
Both countries are major economic powers competing for influence in Asia. While there is deep trade interdependence between them, strategic mistrust continues to grow.
