Prime Minister Shinzo Abe left Japan for a tour of Europe and North America on Monday in preparation for the G20 summit to be held in Osaka in June.
The prime minister will visit France, Italy, Slovakia, Belgium, the United States and Canada and meet with the leaders of those countries.
In France, he is expected to offer support for efforts to rebuild the fire-damaged Notre-Dame Cathedral in Paris when he meets with French President Emmanuel Macron.
Abe and Macron are expected to discuss the agenda for the upcoming G20 summit, including the issue of plastic waste and the marine pollution it causes.
Abe hopes to affirm close cooperation with the French president.
In a meeting with US President Donald Trump, Abe hopes to reaffirm that Japan and the United States will continue to work closely together in dealing with North Korea's denuclearization following the breakdown of the second US-North Korea summit in Hanoi.
The two leaders are also expected to discuss how to proceed with the new round of Japan-US trade negotiations that began last week.
Trump plans to visit Japan in late May as a state guest, making him the first foreign leader to meet the new Emperor. He will also attend the G20 summit in Osaka in June. That means Abe and Trump will have three meetings in three consecutive months.