Speaking on Air Force One, Trump said he was hopeful of a deal when he sees Xi on Thursday, while also indicating he was willing to extend his trip in order to meet North Korean leader Kim Jong Un.

"I have a lot of respect for President Xi and we are going to I think... come away with a deal," Trump told reporters en route from Malaysia, where comments from US and Chinese negotiators raised hopes of an accord.

As dozens of people gathered at Haneda Airport to take photos, the presidential plane -- also bearing Secretary of State Marco Rubio and Treasury Secretary Scott Bessent -- touched down at sunset.

Sporting a golden tie, Trump then boarded a helicopter to take him into the bright lights of the Japanese metropolis in time for an evening audience with the emperor.

On Tuesday, Trump is expected to meet new Prime Minister Sanae Takaichi and make a speech on the USS George Washington aircraft carrier, docked at the US naval base Yokosuka.

"I hear phenomenal things. (Takaichi) was a great ally and friend of Shinzo Abe, who was my friend," Trump said, referring to the assassinated former premier.

"That really helps Japan and the United States, I think she's going to be great."

- Markets watching -

Trump's Asia trip, his first tour of the region since returning to office, kicked off in Malaysia on Sunday with a flurry of agreements.

That included rewarding neighbours Cambodia and Thailand with trade agreements after co-signing their ceasefire pact on the sidelines of the Association of Southeast Asian Nations (ASEAN) summit.

He also agreed a trade and minerals deal with Malaysia, and moved to mend fences with Brazilian President Luiz Inacio Lula da Silva.

But the greatest prize for Trump -- and for global markets -- remains a China deal.

Trump is due to meet Xi on Thursday in South Korea for their first face-to-face talks since the 79-year-old Republican's return to the White House.

Before Trump's arrival in Malaysia, Bessent and China's Vice Premier He Lifeng held two days of trade talks.

China's vice commerce minister, Li Chenggang, said a "preliminary consensus" had been reached.

Bessent said on Air Force One on Monday that they had agreed "a framework for President Trump (and) President Xi to decide".

"It's going to be great for China, great for us," Trump told reporters in Kuala Lumpur.

- Hot trucks -

On Friday, Takaichi announced in her first policy speech that Japan would be spending two percent of gross domestic product on defence this fiscal year.

But Washington, which has around 60,000 military personnel in Japan, wants Tokyo to spend even more, potentially matching the five percent of GDP pledged by NATO members in June.

Most Japanese imports into the United States are subject to tariffs of 15 percent, less painful than the 25 percent first threatened.

But Trump also wants Japan to import more American products, including rice, soybeans and cars, as well as "hot" Ford F-150 pickup trucks.

Questions also surround Japan's commitment to invest $550 billion in the United States, as specified in their July trade deal.

"What I expect is that, since he (Trump) is someone who acts decisively, things might move in a positive direction for Japan," said Tokyo resident Sayaka Kamimoto, 45.

- Kim meeting? -

Trump is due in the South Korean port city of Busan on Wednesday ahead of the Asia-Pacific Economic Cooperation (APEC) summit, and will meet President Lee Jae Myung.

Trump has also fuelled speculation that he could meet North Korea's Kim while on the Korean peninsula.

The two leaders last met in 2019 at the Demilitarised Zone (DMZ), the border area separating the two Koreas.

"I would love to meet with him if he'd like to meet. I got along great with Kim Jong Un. I liked him. He liked me," Trump said on Air Force One.

Asked if he would extend his trip to enable a meeting, he said: "Well, I hadn't thought of it, but I think the answer would be yeah, I would, I would do that, sure."