Japan’s deepening diplomatic crisis with South Korea

Australia & Japan in the Region

Volume 7, No 8, August 2019

Japan’s relationship with South Korea is not amicable at the best of times. Yet it in recent months it has entered a rapidly descending diplomatic spiral of unprecedented depth and scope. Mounting bilateral friction over the intractable ‘history problems’ has been steadily bleeding into the economic and security realms of the relationship. The result has been a bilateral trade war with potential repercussions for the global supply chain of high-tech devices.

On the surface, it would appear that a series of contentious developments in their longstanding history problems drove Tokyo and Seoul to this crisis point. South Korean President Moon Jae-in reneged on a diplomatic accord in 2018 that was purported to ‘irreversibly’ settle the ‘comfort women’ issue. The South Korean judiciary, moreover, has grown increasingly incessant in its demands for Japanese companies to pay damages to the Koreans mobilised for wartime labour.

These bilateral developments are doubtlessly playing a central role in the deterioration of Tokyo–Seoul relations. Yet there are broader strategic parameters to this dispute which are also shaping the contours of diplomatic friction, and these have largely been overlooked by analysts.

In short, there has been a major divergence in Seoul and Tokyo’s strategic views toward North Korea. This began to develop in January 2018 when Seoul embarked on a rapprochement with Pyongyang, while Tokyo’s policy on North Korea remained fundamentally unchanged. This strategic divergence, which has continued to deepen with time, undermine the ability of Japan and South Korea to cooperate in the security realm. By extension, it also reduced their diplomatic incentives to manage their history problem

Abe was not prepared to risk political suicide by following suit with his South Korean and US counterparts

By way of illustration, North Korea’s belligerence throughout 2017 encouraged Seoul and Tokyo to contain their diplomatic problems. As North Korean leader Kim Jong-un rapidly advanced his nuclear program, his missiles were frequently traversing Japanese airspace. Continental United States also came under threat with Kim’s successful launch of an inter-continental ballistic missile. These events provoked a rhetorical war between Kim and US President Donald Trump that threatened to escalate to a de facto war. Indeed, media reports emanating from the United States indicated that Trump was seriously considering a preventive attack—a ‘bloody-nose’ strike—against North Korea.

This precarious security environment provided strong incentives for Seoul and Tokyo to cooperate in the defence realm, and their strategic outlooks on North Korea were aligned closely at the time. Both sides were in favour of strong sanctions, intelligence sharing and trilateral military exercises with the United States. Defence cooperation necessitated keeping their ever-present history problems in check, as collaboration in this sphere has always been tenuous. Against this backdrop, Moon expressed opposition to the 2015 ‘comfort women’ agreement but remained ambiguous as to whether or not he would dissolve it.

Yet when North Korea initiated an about-turn in January 2018, the strategic views of Seoul and Tokyo quickly began to diverge. Kim extended an olive branch to Moon in his 2018 New Year’s address, suggesting that the two Koreas jointly compete in the Winter Olympics. Moon seized upon this this conciliatory gesture, ushering in an inter-Korean rapprochement and a round of regional summitry. To ensure that the diplomatic door remained open to Kim, Moon was reluctant to provoke him, which meant that trilateral exercises with Japan became problematic.

Yet from Tokyo’s point of view, little had changed with regard to North Korea. Japanese Prime Minister Shinzo Abe was not prepared to risk political suicide by following suit with his South Korean and US counterparts. Indeed, the issue of Japanese abductees takes precedence over the North Korean nuclear threat in Japan, and Abe’s domestic political success is explained in part by his hardline stance toward Pyongyang on the abductee question. Consequently, Tokyo became sidelined from the regional summitry.

Amidst this growing strategic divergence, Moon unilaterally dissolved the ‘comfort women’ accord in November 2018. In the same month, Tokyo announced that it would appeal to the International Court of Justice over a South Korean court ruling concerning Korean forced labourers. Relations took a further downturn in January 2019, when the two governments disputed whether a South Korean Navy destroyer had locked its targeting radar on a Japanese maritime patrol aircraft.

Seoul and Washington are likely to persist in engaging North Korea and working toward denuclearisation—at least in the foreseeable future

This downward spiral in Tokyo–Seoul relations has been compounded by their mutual US ally taking more of a backseat than usual in the dispute. Normally, Washington would be strongly encouraging its two key Asian allies to maintain their security cooperation, in spite of their diplomatic issues. However, this is now complicated by the fact that Trump supports—at least in practice—South Korea’s rapprochement policy toward North Korea and is thereby deepening the Tokyo–Seoul strategic divergence.

Although Pyongyang has now resumed missile testing, it is doubtful that this development will incentivise Japan and South Korea to repair their relations. This is because Moon is likely to continue pursuing his rapprochement policy with North Korea and there has already been too much bilateral damage done in Tokyo and Seoul’s current dispute.

There is no clear way out of this diplomatic crisis. What is evident, however, is that Seoul and Washington are likely to persist in engaging North Korea and working toward denuclearisation—at least in the foreseeable future. In light of this, if Tokyo and Seoul wish to pave a foundation for mending their ties, they must recalibrate the strategic parameters of their relationship. Their relations will need to be predicated on mutual engagement with North Korea, rather than the mutual isolation of the past. To achieve this strategic convergence, Tokyo will need to endeavour to end its long-standing impasse with Pyongyang.

About the author

Dr Lauren Richardson is Director of Studies and Lecturer at the Asia-Pacific College of Diplomacy at the Australian National University.

Previously she taught Northeast Asian Relations at the University of Edinburgh (2015-2017) and Keio University (2014) in Tokyo. Her research focuses on the role of non-state actors in shaping diplomatic interactions in the context of Northeast Asia, particularly Japan-South Korea relations.

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