The two hostile states theory () is the official policy of North Korea and the Workers' Party of Korea (WPK) in regards to its relations with South Korea since 2023. The policy, taken by North Korean leader Kim Jong Un, reflects the abandonment of the country's previous policy of promoting Korean reunification on the basis of being constituents of the same Korean nation, instead declaring that the Republic of Korea (ROK) is an "enemy" state of the Democratic People's Republic of Korea (DPRK) with which there can be no discussions. Since the announcement of the policy, North Korea has renamed and removed symbols related to reunification throughout the country.
Korea was divided to North Korea and South Korea after World War II. In 1972, North Korean leader Kim Il Sung proposed the Three Principles of National Reunification, which became North Korea's standard policy regarding the issue of reunification. In the same year, South Korean President Park Chung Hee introduced the Yushin Constitution, which constitutionalized South Korea's claim over the entire Korean Peninsula and mandated the country would seek unification. Since then, the relationship between the two Koreas has waxed and waned, improving when liberal presidents take power in South Korea and deteriorating when conservative presidents are elected.
In December 2023, during a speech at the ninth plenum of the 8th Central Committee of the Workers' Party of Korea, North Korean leader Kim Jong Un called for a "fundamental turnabout" in North Korea's stance towards South Korea, calling the South the "enemy". He stated "the party's comprehensive conclusion after reviewing inter-Korean relations is that reunification can never be achieved with those ROK riffraffs that defined the 'unification by absorption' and 'unification under liberal democracy' as their state policy", which he said is in "sharp contradiction with what our line of national reunification was: one nation, one state with two systems". He stated:
Kim cited South Korean constitution's claims over the entire Korean Peninsula and President Yoon Suk Yeol's policy towards the north as evidence that South Korea is an unsuitable partner for reunification. He continued by saying:
He said the relations between the two Koreas currently were "states hostile to each other and the relations between two belligerent states" and no longer ones that are "consanguineous or homogeneous". He said:
Kim also instructed the WPK on reforming organizations related to inter-Korean relations, including the WPK's United Front Department.
Kim Jong Un further confirmed a shift in policy in January 2024, when he gave a speech to the Supreme People's Assembly (SPA) calling for the constitution to be amended to remove references to cooperation and reunification, as well as specify DPRK's territorial borders and add an article specifying the ROK as the most hostile country. He also rejected the maritime Northern Limit Line, saying that "If the Republic of Korea invades our ground territory, territorial air space, or territorial waters by even 0.001 mm, it will be considered a provocation of war". He called for the removal of physical symbols such as the Arch of Reunification, which he called an "eyesore". The SPA also voted on the abolition of three inter-Korean cooperation organizations; the Committee for the Peaceful Reunification of the Fatherland, the Korean People's Cooperation Administration, and the Kumgangsan International Tourism Administration. Kim said that "independence, peace, and solidarity on the basis of minjok [must] henceforth be erased from the [North Korean] constitution", adding that "the very concepts of unification, reconciliation, and a shared [Korean] minjok must be eliminated".
Following the announcement of the policy, North Korean state media started referring to South Korea as Hanguk () and Daehanminguk () instead of the previously used Namjosà Ân (); the former are the names used by South Korea to refer to itself, while the latter emphasized the view that both Koreas were part of the same nation and that South Korea was the southern constituent of the DPRK. In January 2024, North Korean state television started broadcasting maps that only highlight the northern half of the Korean Peninsula, leaving out South Korean territory. In the same month, North Korean websites Ryomyong and Uriminzokkiri took down sections referencing reunification. Shortly after, North Korean websites targeting South Koreans, including Uriminzokkiri, DPRK Today, Arirang Meari, Tongil Voice and Ryomyong went offline, as well as social media accounts related to them.
The Arch of Reunification was demolished some time between 19 and 23 January 2024, according to satellite imagery. In February 2024, in line with the policy, the lyrics of Aegukka were partially modified, with the phrase "three thousand ri" () referring to the Korean Peninsula being replaced by "this world" (). In May 2024, South Korean Unification Minister Kim Yung-ho said that the UFD has been demoted and changed into the "Workers' Party of Korea Central Committee 10 Bureau" and said that they believe the reorganized entity is tasked with psychological warfare. Seoul-based Daily NK also reported major shifts, saying that most of the duties and staff of the UFD was transferred to the Ministry of Foreign Affairs and the Reconnaissance General Bureau (RGB). It said that the Ministry of Foreign Affairs would now be responsible for handling relations with the South, while the RGB will take over UFD's propaganda and clandestine operations in the South.
In August 2024, the Tongil station (Unification station) was renamed to the Moranbong station. In the same month, Daily NK reported that North Korean authorities ordered "reunification" to be removed from studentsâ textbooks. In October 2024, the North Korea conducted detonations cutting off the Gyeongui and Donghae roads north of the Military Demarcation Line. In the same month, the North Korean Constitution was amended by the 11th Session of the 14th Supreme People's Assembly. The official report published by the Korean Central News Agency mentioned changes to voting and working ages. Later on 17 October, the state media mentioned a constitutional provision that identifies the Republic of Korea as a "hostile state". Daily NK reported that since 2024, the country was moving towards "de-ethnification", de-emphasizing ethnic ties with South Korea. It reported that the Institute of Enemy State Studies determined the "disinterest in reunification is rapidly spreading among South Korean youth and the very concept of ethnic unity is collapsing" and started emphasizing "cultural and genetic differences" between North Koreans and South Koreans, while Kim Jong Un said South Korean youth was "foreign youth who are no longer the same people as us and who can never be on our side". Daily NK also reported some researchers developed an approach of describing young South Koreans as "biologically foreigners who mimic the Korean language but have completely different identities".
In January 2025, Daily NK reported that North Korean government permits to visit the regions along the Korean Demilitarized Zone were renamed from "front line approval number" to "national border approval number", similar to the certificate used in the ChinaâÂÂNorth Korea border. Yonhap News Agency reported in May 2025 that North Korea had issued instructions for state media to not use "puppet Korea" (), which itself was a change from the historically used "puppet South Korea" (), used to imply South Korea is a puppet of the United States. Yonhap suggested the term "puppet" itself "naturally brings to mind a relationship between a nation or a clan," and that, "the cessation of the use of the term 'puppet Korea' appears to be an attempt to block the perception among residents that the South and the North are one nation". Daily NK reported in July 2025 that the National Reunification Institute under the Committee for the Peaceful Reunification of the Fatherland was renamed to the Institute of Enemy State Studies and placed under 10 Bureau. In September 2025, Daily NK reported that North Korea had issued an order to replace maps of the Korean Peninsula displayed in state agency offices nationwide with maps showing only North Korea, with South Korea being labelled as Hanguk as a foreign country.
At the 9th Congress of the Workers' Party of Korea in January 2026, Kim said that North Korea would continue the policy where "all ties with South Korea have been completely eliminated", continuing by saying "The DPRK has absolutely no business dealings with the Republic of Korea, its most hostile entity, and will forever exclude South Korea from the category of fellow countrymen". He rejected the possibility of Korean reunification, accusing South Korea of trying to reunite the Peninsula under the "capitalist reactionary system of liberal democracy". He repeated this at the first session of the 15th Supreme People's Assembly in March, stating "South Korea will be recognized as the most hostile state and will be thoroughly rejected, ignored and dealt with in the most explicit words and actions" and continuing by saying "For any act of South Korea touching our Republic, without the slightest consideration or the smallest hesitation, we will make it pay the price mercilessly".