Prime Minister Fumio Kishida said he told Ukraine President Volodymyr Zelenskyy in a phone call on Friday that he would weigh an invitation to visit Kyiv depending on "various circumstances" but nothing had yet been decided.
Kishida also reaffirmed Tokyo's full support for Ukraine in its fight against Russia as Japan assumes the rotating chair of the Group of Seven leading economies.
"I strongly condemned Russia's continued aggression, and stated that Japan would do its utmost to provide assistance, including to get through the winter, in order to protect the lives of the Ukrainian people," Kishida told reporters.
In a meeting Wednesday with Ambassador Kuninori Matsuda, Andriy Yermak, head of the president's office, issued the invitation to visit at a suitable time after expressing Ukraine's appreciation for Japan's solidarity amid the war with Russia.
The office said Yermak congratulated Japan for assuming the chairmanship of the G7 this year.
Yermak also expressed Kyiv's hopes for continued cooperation with the group, and said that regular dialogue between G7 leaders and Zelenskyy is one of the most effective means for the international community to forge efforts to resist the Russian invasion.
Matsuda emphasized that Japan's position of supporting Ukraine's sovereignty and its territorial integrity is unchanged, said the office.
According to a German think tank, the value of Japan's support for Ukraine was the lowest among G7 nations between January and November.
The G7 nations also include Britain, Canada, France, Germany, Italy and the United States.