Title: Eternal leaders of North Korea
Content:  The functions and powers previously belonging to the president were divided between numerous officials: the premier of North Korea; the chairman of the Supreme People's Assembly, chairman of the Standing Committee of the Supreme People's Assembly; and the head of the military, the chairman of the National Defence Commission (replaced by State Affairs Commission of North Korea in 2016) and supreme commander of the Korean People's Army. These positions are currently held by Kim Tok-hun, Choe Ryong-hae, and Kim Jong-un respectively.
Title: Kim Jong-un
Content:  Kim Jong-un (born 8 January 1982 or 1983) is a North Korean politician who has been Supreme Leader of North Korea since 2011 and the leader of the Workers' Party of Korea (WPK) since 2012. He is the second child of Kim Jong-il, who was North Korea's second supreme leader from 1994 to 2011, and Ko Yong-hui. He is the grandson of Kim Il-sung, who was the founder and first supreme leader of North Korea from its establishment in 1948 until his death in 1994. From late 2010, Kim Jong-un was viewed as successor to the leadership of North Korea. Following his father's death in December 2011, state television announced Kim Jong-un as the "Great Successor". Kim holds the titles of General Secretary of 
Title: North Korea
Content:  Party which participate in the WPK-led Democratic Front for the Reunification of the Fatherland of which all political officers are required to be members. Kim Jong-un of the Kim dynasty is the current Supreme Leader or Suryeong of North Korea. He heads all major governing structures: he is General Secretary of the Workers' Party of Korea, President of the State Affairs Commission, and Supreme Commander of the Armed Forces. His grandfather Kim Il-sung, the founder and leader of North Korea until his death in 1994, is the country's "eternal President", while his father Kim Jong-il who succeeded Kim Il-sung as the leader was announced "Eternal General Secretary" and "Eternal Chairman of the National Defence Commission" after his death in 
Title: Supreme Leader (North Korean title)
Content:  The supreme leader of North Korea is the de facto paramount leader of the party, state and army. The title has not been written into the national constitution as a separate office, but it currently states that the president of the State Affairs Commission is the supreme leader of North Korea. Likewise, according to the WPK Charter, the general secretary of the WPK is the supreme leader of the Workers' Party. Formerly, under Kim Jong-il, this title was bestowed on the office of Chairman of the National Defence Commission, who was also the WPK general secretary. Currently, General Secretary of the Workers' Party of Korea is the first priority political position of the supreme leader. Propaganda workers began calling Kim Il-sung supreme leader in the late 1940s and the term has since been used to describe the status of Kim Jong-il and Kim Jong-un. Generally however, Kim Il-sung and Kim Jong-il were both referred to as "Great Leader" (위대한 수령) and "Dear Leader" (친애하는 령도자) respectively during their tenures as leader.
Title: 2019 in North Korea
Content: Party Chairman and State Chairman: Kim Jong-un ; President of the Supreme People's Assembly: Kim Yong-nam (until 11 April); Choe Ryong-hae (starting 11 April) ; Premier: Pak Pong-ju (until 11 April); Kim Jae-ryong (starting 11 April) 
Title: National symbols of North Korea
Content:  The head of state of North Korea has been the President of the Presidium of the Supreme People's Assembly since 1998. The post was held by Kim Yong-nam since its current inception until the 11th of April 2019 when Choe Ryong-hae took the position.
Title: Chairman of the Standing Committee of the Supreme People's Assembly
Content:  The Chairman of the Standing Committee of the Supreme People's Assembly of the Democratic People's Republic of Korea, formerly known as the President of the Presidium of the Supreme People's Assembly of the Democratic People's Republic of Korea, is the presiding officer of the Standing Committee of the Supreme People's Assembly, which is the highest institution of state power in North Korea when the Supreme People's Assembly is not in session. The Chairman of the Standing Committee was previously considered the de facto head of state of North Korea as he is responsible for representing the state and receiving the credentials and letters of recall of foreign diplomatic representatives, although the constitution designates the President of the State Affairs Commission as the de jure head of state. The current Chairman of the Standing Committee is Choe Ryong-hae, who was elected on 11 April 2019.
Title: Central Court (North Korea)
Content:  The president since 2016 is Kang Yun-sok. The first vice-president is Kim Hwan, who replaced Yun Myong-guk. The other two current vice presidents are Choe Ryong-song and Kim Chong-du. Previous vice presidents have included Choe Yong-song and Hyon Hong-sam. The current president Kang Yun-sok replaced Pak Myong-chol, who had held the post since 2014. Pak was preceded by Kim Pyong-ryul, appointed in 1998, and re-elected in 2003. Before him, Pang Hak-se had been the president between 1972 and his death in July 1992.
Title: 2020 in North Korea
Content: Party Chairman and State Chairman: Kim Jong-un ; President of the Supreme People's Assembly: Choe Ryong-hae ; Premier: Kim Jae-ryong (until 13 August), Kim Tok-hun (from 13 August) 
Title: Kim Jong-il
Content:  Kim Jong-il (born Yuri Irsenovich Kim (Юрий Ирсенович Ким); 16 February 1941 – 17 December 2011) was a North Korean politician who was the second supreme leader of North Korea from 1994 to 2011. He led North Korea from the 1994 death of his father Kim Il-sung, the first Supreme Leader, until his own death in 2011, when he was succeeded by his son, Kim Jong-un. In the early 1980s, Kim had become the heir apparent for the leadership of the Democratic People's Republic of Korea (DPRK) and assumed important posts in the party and army organs. Kim succeeded his father and DPRK founder Kim Il-sung, following the elder Kim's death in 1994. Kim was the General Secretary of the Workers' Party of Korea (WPK), WPK Presidium, Chairman of the National Defence 

Question: who is the leader of north korea today?
Answer: Kim Jong-un.