Hiroshima. Ukrainian President Volodymyr Zelensky arrived Saturday in Japan for talks with the leaders of the world’s most powerful democracies, a personal appearance meant to galvanize global attention as the nations ratcheted up pressure on Moscow for its 15-month invasion of Ukraine.

Bolstering international support is a key priority as Ukraine prepares for what's seen as a major push to take back territory seized by Russia in the war that began in February last year. Zelensky's in-person visit to the G7 summit comes just hours after the United States agreed to allow training on potent American-made fighter jets, laying the groundwork for their eventual transfer to Ukraine.

Host nation Japan said Zelensky's inclusion stems from his “strong wish” to participate in talks with the bloc and other countries that will influence his nation’s defense against Russia.

“Japan. G7. Important meetings with partners and friends of Ukraine. Security and enhanced cooperation for our victory. Peace will become closer today,” Zelensky tweeted upon his arrival on a plane provided by France.

A European Union official, speaking on condition of anonymity to brief reporters on the deliberations, said Zelensky will take part in two separate sessions Sunday. One session will be with G7 members only and will focus on the war in Ukraine. Another will include the G7 as well as the other nations invited to take part in the summit, and will focus on “peace and stability.”

U.S. national security adviser Jake Sullivan said that President Joe Biden and Zelensky would have direct engagement at the summit. On Friday, Biden announced his support for training Ukrainian pilots on U.S.-made F-16 fighter jets, a precursor to eventually providing those aircraft to Ukraine.

“It is necessary to improve (Ukraine’s) air defense capabilities, including the training of our pilots,” Zelensky wrote on his official Telegram channel after meeting Italian Premier Giorgia Meloni, one of a number of leaders he talked to.

Zelensky also met with Indian Prime Minister Narendra Modi, their first face-to-face talks since the war, and briefed him on Ukraine's peace plan, which calls for the withdrawal of Russian troops from the country before any negotiations.

Russia's deputy defense minister, Alexander Grushko, accused Western countries of “continuing along the path of escalation," following the announcements that raised the possibility of sending F-16s to Kyiv.

The G7 vowed to intensify the pressure in its joint statement Saturday.

“Russia’s brutal war of aggression represents a threat to the whole world in breach of fundamental norms, rules and principles of the international community. We reaffirm our unwavering support for Ukraine for as long as it takes to bring a comprehensive, just and lasting peace,” the group said.

The green light on F-16 training is the latest shift by the Biden administration as it moves to arm Ukraine with more advanced and lethal weaponry, following earlier decisions to send rocket launcher systems and Abrams tanks. The United States has insisted that it is sending weapons to Ukraine to defend itself and has discouraged attacks by Ukraine into Russian territory.

“We’ve reached a moment where it is time to look down the road again to say what is Ukraine going to need as part of a future force, to be able to deter and defend against Russian aggression as we go forward,” Sullivan said.

Biden’s decisions on when, how many, and who will provide the fourth-generation F-16 fighter jets will be made in the months ahead while the training is underway, Biden told leaders.

The G7 leaders have rolled out a new wave of global sanctions on Moscow as well as plans to enhance the effectiveness of existing financial penalties meant to constrain President Vladimir Putin’s war effort. Russia is now the most-sanctioned country in the world, but there are questions about the effectiveness.

The G7 includes Japan, the United States, the United Kingdom, France, Germany, Canada and Italy, as well as the European Union.