North Korea’s Quite Rational Japan Overfly – The Atlantic

 In World
This week, North Korea launched a missile designed to carry what it has described as a “large-sized, heavy nuclear warhead” over Japan. Following the launch, North Korea made clear its intentions for future tests. Kim Jong Un called for “more ballistic rocket launching drills with the Pacific as a target,” according to a paraphrase of his order by North Korean state-run media. That’s an important first, and represents North Korea’s single-most provocative ballistic missile test since it began testing its first-generation Scuds in the 1980s.

For observers of North Korea’s ballistic-missile program, the spate of long-range missile system tests over the past 30 months comes as no surprise. If there was a surprise, it’s the rate at which Pyongyang has been crossing various technical milestones. Over a matter of months, North Korea has shown off new high-performance missiles that will eventually form the core of its burgeoning nuclear forces—Kim Jong Un’s ultimate insurance policy against the fate of Saddam Hussein and Muammar Qaddafi.

Every North Korean ballistic missile test is provocative and illegal. The overfly was certainly both, but for North Korea, it was about far more than theatrical provocation. Launches like the one of this week are set to become more common because they both provide North Korea with key technical information about its deterrent, and serve an important strategic purpose in improving its position should it ever end up at the negotiating table with the United States.

This recent overflight of Japan wasn’t North Korea’s first: In 1998, 2009, 2012, and 2016, North Korea overflew its territory with projectiles. None were designed to serve as strategic nuclear-delivery systems; all were satellite-launch vehicles, designed to deliver payloads into low-earth orbit and not reenter the atmosphere. Some analysts had long worried that the underlying technologies of these vehicles would eventually form the basis of an ICBM, but the large and unwieldy designs Pyongyang showed off had major shortcomings. For one, none of those designs would allow for the kind of  mobility that North Korea’s much smaller KN17 and KN20 systems enjoy. (Without mobility, the missiles would be sitting ducks at fixed launch sites during wartime—an invitation to preemption by the United States.)

Nonetheless, the first of those launches in 1998 was regarded as an exceptional provocation, giving Japan a glimpse of a terrifying future in which North Korean missile overflies could become a fact of life. The launch sparked Japan’s ongoing interest in ballistic-missile defense, spurring investments in sea-based interceptors like the Standard Missile-3 Aegis interceptors and the Patriot Advanced Capability-3 system as a hedge against that possible future. (Only the former has the capability to intercept a missile like the one North Korea just flew over Japan, and only under particular conditions.)

As of this week, Japan’s terrifying future has merged with its present. Even as a clearly agitated Japanese Prime Minister Shinzo Abe reacted to North Korea’s launch on Tuesday morning, saying that his country would take “all possible measures” to ensure the safety of its people, he no doubt knew what lay ahead for Japan.

Earlier this year, Japan began ballistic-missile-attack evacuation drills for its citizens living near likely North Korean target areas. The Japanese government is also seeking earmarked funds in its 2018 budget request for new ballistic missile defense systems. Tokyo may also look to acquire the Terminal High Altitude Area Defense system—the defensive system that has been at the center of domestic and international controversy in South Korea—though this may be less cost effective. Finally, the inexorable growth of the North Korean threat toward Japan may well accelerate plans in Abe’s right-wing Liberal Democratic Party to revise the country’s pacifist constitution, allowing Tokyo to formally wield precision-strike weapons for potential use against North Korea.

Even as Tokyo reckons with the arrival of its long-feared nightmare, it’s important to recognize that there are important reasons for Pyongyang—which remains rational despite the metronymic exhortations of many analysts to the contrary—to continue to overfly Japan with its missiles.

On a technical level, a ballistic missile flown at the kind of trajectory North Korea demonstrated this week experiences physical and temperature stresses more in line with what it would see during operational use. North Korea’s “lofted” tests, which fly the missile to immense altitudes, keeping its range contained to the Sea of Japan, provide some useful data in this regard. However, a launch like this week’s gives North Korean scientists a chance to observe how the missile may perform in a real attack. (There are outstanding questions, though, about how North Korea would have gathered telemetry data from this missile in the northern Pacific Ocean, where it is thought to have splashed down.)

On a strategic level, Pyongyang hopes that these kinds of tests get Japan and South Korea to question the utility of their respective alliances with the United States. North Korea made clear it undertook this launch because Washington ignored its previous overture—yes, the Guam saga was actually an invitation to negotiations—and carried on with the Ulchi-Freedom Guardian exercise with South Korea.

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