The nuclear-armed North invaded its neighbour in 1950, starting the Korean War.
PIC: South Korean President Moon Jae-in (C) is welcomed by North Korean citizens as North Korean leader Kim Jong Un (R) looks on during a welcoming ceremony at Pyongyang airport on Tuesday. (AFP)
South Korea's president and the North's leader Kim Jong Un drove through the streets of Pyongyang together past thousands of cheering citizens Tuesday ahead of a summit where Moon Jae-in will seek to reboot stalled denuclearisation talks between North Korea and the United States.
Kim welcomed his visitor at Pyongyang's international airport -- where he had supervised missile launches last year as tensions mounted -- the two leaders of the divided Korean Peninsula embracing after Moon walked down the steps of his aircraft.
The North's unique brand of choreographed mass adulation was on full display as hundreds of people on the tarmac waved North Korean flags and unification ones depicting an undivided peninsula.
The South's own emblem was only visible on Moon's Boeing 747 aircraft.
Thousands more people, holding bouquets and chanting in unison "Reunification of the country!", lined the streets of the city as Kim and Moon rode through in an open-topped vehicle, passing the Kumsusan Palace where Kim's predecessors -- his father and grandfather -- lie in state.
The nuclear-armed North invaded its neighbour in 1950, starting the Korean War, and regularly stresses the importance of reunifying with the now far wealthier South.
Moon -- whose own parents fled the North during the three-year conflict -- is on a three-day trip, following in the footsteps of his predecessors Kim Dae-jung in 2000 and mentor Roh Moo-hyun in 2007.
The North's Korean Central News Agency (KCNA) said the summit "will offer an important opportunity in further accelerating the development of inter-Korean relations that is making a new history."
The first visit by a South Korean leader to Pyongyang in a decade is also the men's third meeting this year after two previous summits in April and May in the Demilitarized Zone that divides the peninsula.
Moon has been instrumental in brokering the diplomatic thaw that saw a historic summit between Kim and US President Donald Trump in Singapore in June, where Kim backed denuclearisation of the Korean peninsula.
But no details were agreed and Washington and Pyongyang have sparred since over what that means and how it will be achieved.
The US is pressing for the North's "final, fully verified denuclearisation", while Pyongyang wants a formal declaration that the 1950-53 Korean War is over and has condemned "gangster-like" demands for it to give up its weapons unilaterally.
A commentary in the Rodong Sinmun, the mouthpiece of the North's ruling party, repeated the description Tuesday, saying Washington was "totally to blame" for the deadlock and adding: "The US is stubbornly insisting on the theory of 'dismantlement of nukes first'."
With Seoul and Washington moving at increasingly different speeds in their approaches to Pyongyang, Kim will look to secure more Southern-funded projects in the North.
For his part the dovish South Korean president is looking to tie the two tracks closer together to reduce the threat of a devastating conflict on the peninsula.
Moon will hold at least two rounds of talks with Kim and try to convince him to carry out substantive steps towards disarmament that he can present to Trump when he meets him later this month on the sidelines of the UN General Assembly in New York.
"If this visit somehow leads to the resumption of the US-North Korea talks, it would be significant enough in itself," Moon was quoted as saying before departure.
But analysts played down expectations.
The meeting "will probably generate rosy headlines but do little to accelerate efforts to denuclearise North Korea", Eurasia Group said in a note.
Kim would push for enhanced North-South cooperation "especially in areas that promise economic benefits for the North", it added.
"Progressives inside and outside Moon's government will have strong incentives to inflate the summit's accomplishments, initially obscuring what will likely be a lack of major deliverables."
Moon was accompanied by business tycoons including Samsung heir Lee Jae-yong and the vice chairman of Hyundai Motor, and is scheduled to visit key sites in Pyongyang with his delegation.
Moon -- whose poll ratings have been falling in the face of a struggling economy in the South -- has been pushing inter-Korean cooperation but South Korean media have urged caution, calling for such schemes to await substantial progress towards denuclearisation.
"Quite a number of people are now fed up with the surprise events between the leaders," the conservative Chosun Ilbo newspaper said in an editorial Tuesday.
"President Moon must head to Pyongyang with the resolve that the first, second, third agenda of this summit is denuclearisation."