Why country for the Trump-Kim summit?

It has one foot in the East and one in the West, is ultra-modern, secure and sometimes mocked as being a little dull -- Singapore was the safe pick for a historic first meeting between the unpredictable leaders of the US and North Korea.

US President Donald Trump on Thursday confirmed the summit -- a first between a sitting US president and a North Korean leader -- would take place in Singapore on June 12.

"We will both try to make it a very special moment for World Peace!" he tweeted.

It followed a second visit to Pyongyang by US Secretary of State Mike Pompeo on Wednesday to make arrangements for the summit.

The Southeast Asian financial hub was likely chosen due to its neutrality, security advantages and track record of hosting international summits, observers say.

The ultramodern city-state has robust security infrastructure and is widely considered one of the safest cities in Asia.

It has tight restrictions over media and public gatherings, which will allow for a controlled environment likely to be preferred by the North Koreans.

Singapore is also in the rare position of having friendly diplomatic ties with both Washington and Pyongyang.

It considers the US a close partner, while North Korea maintains a fully functioning embassy in the city-state.

Singapore and the North have a long history of cooperation -- the first law firm and fast food restaurant in Pyongyang were both set up by Singaporeans -- even if relations hit a snag last year when Singapore enforced new UN sanctions on trade.

Singapore will also be an acceptable choice to China, North Korea's only major ally, which wields a strong influence despite its physical absence from next month's proceedings.

"As a neutral, and objective country with much-admired consistent foreign policy principles and a small state with no desire or capacity to harm other states and their interests, Singapore fits that bill well," said Lim Tai Wei, adjunct research fellow at the National University of Singapore's East Asia Institute.

'No baggage'

By apparently agreeing to meet Trump 5,000 kilometres (3,100 miles) away from Pyongyang, Kim has to travel a significant distance out of his comfort zone, said Graham Ong-Webb, a research fellow at the S. Rajaratnam School of International Studies (RSIS).

Since Kim took over as leader, he has rarely left his isolated nation and has only officially ventured away from home this year, with two visits to China, most recently travelling to the northeastern port city of Dalian where he met Xi.

He also stepped across the border into South Korea during a historic meeting with President Moon Jae-in in April, making him the first Northern leader to set foot in the South since the Korean War ceasefire in 1953.

Remarkable images of the two leaders greeting each other warmly over the Military Demarcation Line that splits their countries, rich with symbolism and high political theatre, were broadcast around the world.

Trump had previously suggested that the demilitarised zone between the two Koreas could be a venue for his meeting with Kim, before ruling it out on Wednesday.

Nearby Mongolia was also ruled out as a possible neutral third-country venue, reportedly for security reasons.

But for Trump and Kim, Singapore is a convenient venue precisely because it "doesn't have the historical or political baggage," said Sarah Teo, an associate research fellow at RSIS's regional security architecture programme.

Singapore also has a track record for hosting international summits.

In 2015, the city-state played host to a historic meeting between China's president Xi Jinping and then Taiwanese president Ma Ying Jeou.

It hosts the annual Shangri-La Dialogue, a defence forum regularly attended by heads of state, defence ministers and high level military officials.

Now the venue and date have been chosen, it only remains to be seen if Singapore will play host to a meeting that truly builds on hopes for the complete denuclearisation of the peninsula and a formal peace treaty to end the 1950-53 Korean War.