On August 5, 2026, Kim Yo Jong — a senior North Korean official and the sister of leader Kim Jong Un — warned that North Korea would take "additional military options" because Japan tested a US-made missile called the Tomahawk. She accused Japan of giving up its defensive stance and turning into a country that can launch attacks first. North Korea's state news agency, KCNA, published her statement on Wednesday. Al Jazeera

Japan fired the Tomahawk from a warship called the Chokai in the Pacific Ocean. A Tomahawk is a missile that flies low to the ground to avoid being detected and can travel more than 1,000 kilometers — far enough to reach another country from Japanese waters. Kim Yo Jong also mentioned that Japan joined a US-led military exercise in the Philippines in May 2026. She tied these two events together to argue that Japan is building up its military power. She also said the United States is helping Japan by supplying the missiles, upgrading ships to carry them, and supporting the tests. Reuters

This is not a one-time complaint. Since July 2026, North Korea's state media has published at least six articles criticizing joint military activities by the US, South Korea, and Japan as a threat to regional security. This fits a pattern going back through the year. In March, Kim Yo Jong said US-South Korea military drills harm regional security and show "inveterate" — meaning deep-rooted — hostility toward North Korea. Reuters In late July, North Korean state media said the expansion of US forces in Japan raises risk to the Korean peninsula. Reuters

North Korea has backed up its words with action. In April 2026, North Korea tested missiles from a naval warship while Kim Jong Un and his daughter watched. Reuters In May, North Korea fired projectiles including short-range ballistic missiles — missiles that travel a short distance but very fast — according to South Korea's military. Reuters Earlier in April, North Korea fired missiles after Kim Yo Jong mocked South Korea as "world-startling fools." AP News

Kim Yo Jong is the regime's most visible voice on security matters, so her remarks carry weight as a signal of what North Korea prioritizes. Her August 5 statement follows a pattern that has appeared repeatedly this year: she denounces a specific military activity by a US ally, frames it as part of a larger effort to surround North Korea, and warns of a response in kind. The Tomahawk test is especially sensitive because the missile gives Japan the ability to strike targets on another country's territory — not just defend its own. North Korea has long argued this crosses the line from defense to offense.

Japan acquiring the Tomahawk is a major change for its military, which is called the Self-Defense Forces. After World War II, Japan adopted a constitution that limited its military to defense only. North Korea, China, and even some Japanese critics say that being able to strike another country's territory goes against that principle. The test from the Chokai shows Japan is now fitting the missile onto its warships, which extends its reach across the waters of East Asia.

Analysts see Kim Yo Jong's statement as a deliberate effort to shape the narrative. Pyongyang wants to portray Japan's military upgrades as a direct threat, which it can then use to justify developing its own weapons, according to analysts cited by Al Jazeera. Yang Moo-jin, a professor at the University of North Korean Studies in Seoul, said Kim's comments try to frame Japan's actions as part of a broader US plan to build up allied military power against North Korea. Lim Eul-chul, a professor at Kyungnam University's Institute for Far Eastern Studies, said the messaging could set the stage for future military demonstrations, including missile tests or displays of undersea strike capabilities.

The broader context here is that three trends are coming together at once in East Asia. Japan is carrying out its biggest military modernization in decades, pushed by laws that have eased restrictions on its military and by purchases like the Tomahawk. The US, South Korea, and Japan have grown closer militarily, with joint exercises becoming a regular routine. And North Korea has responded to each development with both words and weapons tests, using every step as a reason to build up its own capabilities.

There is also a domestic political side to Kim Yo Jong's messaging. By pairing Japan's Tomahawk test with the US-led drill in the Philippines, she builds a story in which North Korea is the victim responding to being surrounded, rather than the one starting trouble. This serves two purposes: it lets North Korea claim that any future military action is a defensive necessity, and it reinforces the message at home that outside threats require continued spending on missiles and nuclear weapons. The six KCNA articles since July suggest this is a planned messaging strategy, not just spontaneous reactions.

Whether Kim Yo Jong's warning of "additional military options" leads to a specific weapons test is an open question, but the pattern from 2026 offers a clear precedent. Each major escalation in North Korea's rhetoric this year has been followed within weeks by a military action, from the April warship missile tests to the May launches. Lim Eul-chul's suggestion about undersea strike capabilities, if it happens, would be a notable step up — potentially meaning submarine-launched missile tests or related naval demonstrations.

The US and Japan have not publicly responded to Kim Yo Jong's specific threats. Japan's Defense Ministry confirmed the Tomahawk test from the Chokai. The test is the result of a decision Japan made under its revised national security strategy, which said the country needs the ability to strike from far away as a way to deter attacks.