Ukrainian President Volodymyr Zelensky landed in Hiroshima on Saturday afternoon, marking his longest trip since Russia invaded his country.

He arrived in Japan shortly after President Joe Biden reversed course and gave European allies the green light to send F-16 fighter jets to Ukraine in its battle against Russia. 

Zelensky will meet with Biden on Sunday as part of his campaign to shore up support among the Western allies ahead of a planned Spring offensive to try and drive Russian President Vladimir Putin's forces from his country.

He arrived on a French plane at the heavily guarded Hiroshima airport. 

Before he arrived at the G7, Zelensky stopped in Jeddah, Saudi Arabia, to address the Arab League Summit. In his remarks, he accused some Arab leaders of ignoring the horrors of Russia's invasion of his country.

Unfortunately, there are some in the world and here, among you, who turn a blind eye to those cages and illegal annexations,' he said, urging them to 'take an honest look' at the war.

Ahead of Zelensky's arrival, Biden, facing pressure from Europe to help Ukraine end the conflict, agreed to allow European countries with F-16s to transfer some of the war planes to the embattled nation.

'President Biden informed his G7 counterparts the United States will support the joint effort to train Ukrainian pilots on fourth generation fighter aircraft including F-16s,' National Security Adviser Jake Sullivan told reporters on Saturday.

'Over the past few months we and our allies and partners have really focused on providing Ukraine with the system's weapons and training needs to be able to conduct effective offensive operations this spring,' he said.

Ukraine is planning a massive counter offensive to retake its territoryterrority and attempt to drive out Russian President Vladimir Putin's forces. But the delivery of F-16s - and the training to operate them - will take months.

Biden will meet with Zelensky on Sunday. Zelensky's surprise appearance comes after a stop in Jeddah to address the Arab League. He's traveling on a French military plane.