Japanese Prime Minister Shinzo Abe and US National Security Adviser John Bolton held talks in Tokyo Friday to discuss US President Donald Trump's four-day state visit.

Japanese government sources said Abe told Bolton that Trump's visit would be a historic one, as he will be the first guest of the state to meet with Emperor Naruhito, who took the throne on May 1.

Abe also expressed his hope that through Trump's visit, Japan and the US could strengthen their bilateral alliance.

Bolton told a press briefing after meeting with Abe that Trump is looking forward to holding productive discussions on a range of important issues and was honored to be the first visitor of state to meet the new Japanese emperor.