South Korea details Kim Jong Un's 140 kg weight and daughter's succession role

Intelligence findings on health and mobility

South Korea's National Intelligence Service assessed that North Korean leader Kim Jong Un weighs over 140 kilograms and is classified medically as extremely obese. South Korean lawmaker Youn Kun-young presented the findings to reporters on Wednesday following a closed-door briefing in Seoul. According to the intelligence assessment, the 42-year-old leader remains a chain smoker and faces a high statistical risk of cardiovascular illness. Despite those physical risk factors, South Korean intelligence observed no current indications of acute medical failure or physical limitations. Kim continues to conduct state inspections without evident strain and moved up flights of stairs rapidly during recent official visits.

Youn conveyed the conclusion of the intelligence agency regarding Kim's daily care.

We can consider that there are no signs of health problems, given the close monitoring carried out by his personal medical team.

Family history and leadership risks

Health assessments of North Korea's leadership remain a central focus for security officials in Seoul due to the regime's expanding nuclear capabilities. Kim's hereditary background features significant cardiovascular disease. Both his father, Kim Jong Il, and his grandfather, Kim Il Sung, were obese, heavy smokers who ultimately died from heart attacks. An unexpected incapacitation or death of the leader would create immediate instability regarding chain-of-command authority and nuclear controls. Widespread public speculation regarding his physical condition surfaced in 2020, when Kim disappeared from public view for roughly 20 days, failing to attend a state commemoration for Kim Il Sung amid rumors of surgery.

Growing profile of Kim Ju Ae

In parallel with the medical review, South Korea's intelligence service reported the steady elevation of Kim's daughter, Kim Ju Ae, as his prospective political heir. Intelligence officials documented approximately 30 public appearances by Kim Ju Ae in 2026, marking her most active year of public engagements. While her early appearances centered strictly on military missile tests and armed forces ceremonies, her portfolio has broadened to cover social gatherings, domestic political functions, and foreign affairs. The intelligence agency estimated that Kim Ju Ae stands about 160 centimetres tall and weighs more than 50 kilograms. South Korean analysts noted that state media increasingly portrays her with adult styling, including formal two-piece suits and high heels, while state protocol gives her elevated seating positions.

Dietary habits and domestic shortages

Kim's personal dietary habits continue to draw attention alongside the country's broader systemic challenges. Chef Paul Smart, who prepared banquets at the Metropole Hotel in Hanoi during the 2019 summit between the United States and North Korea, previously detailed the leader's private culinary tastes after collaborating with Kim's kitchen staff.

He likes caviar, lobster, really luxury products. Foie gras. He really loves to indulge.

These preferences contrast with the nutritional realities across North Korea, where international sanctions over weapons programs coincide with chronic agricultural shortages. In February, UN Special Rapporteur on Human Rights in North Korea Elizabeth Salmon published a report identifying widespread food scarcity as a severe humanitarian problem across the country.