North Korea's Kim Yo Jong, the influential sister of leader Kim Jong Un, has issued a stark military warning to Japan, threatening that Pyongyang will pursue "additional military options" in response to what she described as Tokyo's accelerating transformation into a "war state." The statement, published Wednesday by North Korea's state-run Korean Central News Agency, marks some of Kim's strongest rhetoric directed at Japan in recent months.
Kim cited two specific developments as evidence of Japan's shifting military posture: the test-firing of US-made Tomahawk long-range cruise missiles from the Aegis destroyer Chokai in the Pacific Ocean, and Japan's participation in US-led joint military drills in the Philippines in May. She accused the United States of directly enabling Tokyo's buildup by supplying the missiles, modifying vessels for their operation and supporting the tests. "The US is behind such dangerous military moves of Japan," she said, framing Washington's role as an attempt to strengthen what she called its "shock brigade" in the Asia-Pacific region.
Japan has been steadily moving away from the pacifist defence posture it adopted after its defeat in World War II — a shift that carries particular historical weight on the Korean Peninsula, which Japan occupied until 1945. That colonial legacy continues to shape North and South Korean attitudes toward Japanese rearmament. In recent years, Tokyo has significantly increased military spending, expanded defence partnerships and deployed missile launchers to its outer islands. Japan raised its military expenditure by 9.7 per cent to approximately $62.2 billion in 2025, its highest share of GDP since 1958. Japan's defence minister said this week the military must be strengthened with a "sense of urgency and crisis," citing threats from China, Russia and North Korea.
Analysts see Pyongyang's messaging as serving a dual purpose. By framing Japan's modernisation as an aggressive and preemptive threat, North Korea can justify its own continued weapons development to domestic and international audiences. Experts note that such statements can also lay the groundwork for future military demonstrations, potentially including missile tests or displays of undersea strike capabilities. Since July, North Korean state media has published at least six editorials condemning US-South Korean-Japanese security cooperation as destabilising to the region.
The warning comes against a backdrop of broader regional tension. China, a key North Korean ally, has also voiced alarm over what it characterises as resurgent Japanese militarism. North Korea has repeatedly declared itself an "irreversible" nuclear state since the 2019 collapse of denuclearisation talks between Kim Jong Un and US President Donald Trump. Whether Kim Yo Jong's latest statement signals concrete military planning or is primarily intended as political signalling remains unclear, but it underscores how Japan's defence transformation is increasingly reshaping security calculations across Northeast Asia.