North Korea-Japan geopolitical tensions and military escalation

North Korea vows to teach ‘war criminal state’ Japan lesson over missile test

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Prime Minister Sanae Takaichi suggested military reaction to Chinese actions in Taiwan.

In November 2025, Prime Minister Sanae Takaichi suggested that actions taken by China to seize Taiwan could merit a response from Japan's military.

Japan's military expenditure reached its highest share of GDP since 1958 in 2025.

In 2025, Japan's military expenditure rose by 9.7 percent to US$62.2 billion, representing 1.4 percent of its GDP. This figure marks the highest share of GDP for the nation's military spending since 1958.

The increase follows a national security strategy adopted in 2022 that allows Japan to acquire the ability to strike enemy missile bases as a self-defense measure. The Japanese government has noted growing threats from China, Russia, and North Korea as part of its security assessment.

Japan adopted a national security strategy allowing strike capabilities against enemy missile bases.

In 2022, Japan adopted a national security strategy that permits the country to acquire the ability to strike enemy missile bases. This move is framed as a self-defense measure within the limits of its war-renouncing constitution.

Following this shift, North Korean official Kim Yo Jong, the sister of leader Kim Jong Un, accused Japan of transforming into a 'war state' and a 'war criminal state.' She further claimed that Japan's actions serve as a tactic to hide ambitions for becoming a 'military giant' and urged the international community to stay vigilant against what she described as 'wartime expansionism.'

North Korea declared itself an irreversible nuclear state following the collapsed summit with Donald Trump.

North Korea has maintained its status as an irreversible nuclear state since the 2019 summit between Kim Jong Un and US President Donald Trump collapsed.