Kim Jong Un Reveals First Nuclear-Powered Submarine
Image: 毎日新聞

Kim Jong Un Reveals First Nuclear-Powered Submarine

25 December, 2025.North Korea.22 sources

Key Takeaways

  • State media showed a largely completed 8,700‑ton submarine hull inspected by Kim Jong Un
  • KCNA said the vessel will be nuclear‑armed, provide long submerged endurance, and serve strategically
  • Analysts warn propulsion, weaponization, and operational readiness remain unverified despite released hull images

North Korea submarine update

North Korea’s state media released photos and footage showing leader Kim Jong Un inspecting what it described as an 8,700-ton nuclear-propelled submarine with a largely finished, anti-corrosion-coated hull.

A recent launch occurred amid rising tensions as North Korean leader Kim Jong Un accelerates his nuclear-weapons program and deepens ties with Russia after the Ukraine invasion

ABC NewsABC News

State outlets said the images marked progress toward Pyongyang’s declared nuclear-submarine program first announced in 2021.

Image from ABC News
ABC NewsABC News

KCNA’s coverage presented the ship as a milestone in naval modernization and accompanied imagery of Kim with officials and his daughter at the site, though state outlets did not provide a firm launch date for the vessel.

International reporting framed the release as the first detailed hull images since March, and some outlets emphasized that the production site appeared closed, suggesting the boat has not been launched yet.

Submarine hull implications

Analysts and news outlets differ on what hull images imply about the submarine's technical status and timeline.

Some analysts cited by technology and defense outlets say a completed hull often means major internal systems may already be installed and that the boat could be launched for sea trials within months, though operational readiness would remain uncertain.

Image from CNBC
CNBCCNBC

Other mainstream analysts and Western outlets noted that the design and size suggest a nuclear reactor is plausible but stressed it could take years before the sub can conduct operational missile tests, and that South Korea's own path to nuclear-powered submarines will likely take a decade or more.

KCNA submarine missile claims

State media said Kim supervised a test of new long-range surface-to-air or anti-air missiles, and KCNA claimed the vessel could launch such missiles.

Several outlets repeated those claims while noting the state's tendency to present demonstrative imagery.

Some reports said projectiles shown in state media may have been models rather than operational missiles.

Submarine push and succession

Kim used the release to frame the submarine as part of a broader push for "greater offensive power" and to criticize regional moves by Seoul and allies, with KCNA quoting him calling the program "epoch‑making" and describing the ships as central to national defense.

State reporting also showed Kim with his daughter, Kim Ju Ae, and multiple international outlets reproduced the images and cited analysts who say her presence fuels speculation she may be a potential successor, a point noted by mainstream Western outlets alongside the state's military messaging.

Image from El Mundo
El MundoEl Mundo

North Korea submarine claims

Some linked the announcement to broader tensions, noting criticism of South Korea's and Japan's moves and comments regarding U.S. naval activity.

Image from El.kz
El.kzEl.kz

Other outlets stressed the claim remains unverified and that operational capability, particularly a functional reactor and seaworthy missile systems, has not been proven.

Several sources contextualized the announcement amid reports of wider Pyongyang activity and foreign ties.

Analysts are split and outside confirmation is limited, leaving key details ambiguous.

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