Japan will offer Ukraine fresh financial support worth $5.5 billion, Prime Minister Fumio Kishida said Monday, days before the first anniversary of Russia's invasion.

Japan, this year's Group of Seven president, has joined Western powers in imposing sanctions on Moscow since the war began on Feb. 24, 2022.

It has already provided Ukraine with financial support worth $600 million along with hundreds of millions of dollars' worth of emergency humanitarian assistance, according to the Prime Minister's Office.

But "there is still a need to assist people whose livelihoods have been destroyed by the war, and to restore destroyed infrastructure," Kishida said in a speech at a think tank symposium in Tokyo.

"We have decided to provide additional financial support of $5.5 billion."

Kishida also announced he will host a video conference of the G7 leaders with Ukrainian President Volodymyr Zelenskyy on Friday, the invasion's one-year anniversary.

"This year, Japan, as G7 president and a nonpermanent member of the U.N. Security Council, will support Ukraine in its fight against Russian aggression and lead the world's efforts to uphold a free and open international order based on the rule of law," Kishida said.

The G7 leaders will meet in person in Hiroshima in May.

Since Russian President Vladimir Putin's invasion was launched, Japan has also taken the rare steps of sending defensive equipment and offering refuge to those fleeing the conflict.

The country's pacifist post-war Constitution limits its military capacity to ostensibly defensive measures.

Kishida's announcements came as U.S. President Joe Biden, on an unannounced visit to Kyiv, promised increased arms deliveries for Ukraine.

It is Biden's first visit to Ukraine since the war began, and the trip was hailed by Zelenskyy as "an extremely important sign of support for all Ukrainians."