Her visit came during an escalation of attacks on both sides in the conflict.

“I once again strongly condemn Russia’s missile and drone attacks, particularly on New Year’s Day,” said Kamikawa, the first foreign guest in Ukraine this year.

She announced that Tokyo would “allocate US$37 million to provide a drone detection system”.

Japan will also supply five generators to help Ukraine “survive” another winter during the Russian assault, she said.

Kamikawa visited the Kyiv suburb of Bucha, where Russian forces are blamed for a 2022 massacre of civilians, saying she was “shocked” by what she saw. She also went to Irpin, a past scene of heavy fighting.

Her previously unannounced visit was a change to a two-week tour plan starting on Friday that was to take in Poland, Finland, Sweden, the Netherlands, the United States, Canada, Germany and Turkey.

Kamikawa and Kuleba also discussed Japan’s plans to host a conference to promote Ukraine’s economic reconstruction in Tokyo on February 19.

He said Kyiv was thankful for Japan’s decision last year to provide Ukraine with F-16s jets, but said the country also needed air defence systems.

“Every day, Ukrainian cities are destroyed by Russian missiles and drones. They cannot capture us, so they are trying to destroy us,” he said.

Kuleba also said the two discussed “threats from North Korea”.

Japan’s foreign ministry earlier said Kamikawa would “demonstrate Japan’s determination to uphold the international order based on the ‘rule of law’ from the perspective that unilateral changes to the status quo by force, such as Russia’s aggression against Ukraine, cannot be accepted”.

Ukraine’s Prime Minister Denys Shmygal also hailed a “meaningful meeting” with Kamikawa, thanking Japan for its “comprehensive support” including humanitarian and financial help.

In a Telegram message, he applauded Japan for its “decision to allocate US$1 billion for humanitarian projects and reconstruction, with a readiness to increase this amount to US$4.5 billion through the mechanisms of international institutions”.

He said the meeting also covered the Ukrainian president’s formula for peace, the implementation of reforms and cooperation in infrastructure.

“We continue to strengthen trade relations and ties between Ukrainian and Japanese businesses,” Shmygal wrote on Telegram.

“We have already held meetings with two business delegations from Japan and are interested in locating production facilities of leading Japanese companies in Ukraine,” he added.

Sitting alongside his visitor, the Ukrainian foreign minister also noted Kyiv’s key ask of its allies, saying, “I informed my colleague … of Ukraine’s needs not only in aircraft, but above all in air defence systems.”

Japan said last month that it would prepare to ship Patriot air defence missiles to the United States after revising its arms export guidelines, in the pacifist nation’s first major overhaul of such export curbs in nine years.

It still cannot ship weapons to countries at war, but the move could indirectly benefit Ukraine by boosting Washington’s capacity to provide military aid to its ally.

Additional reporting by Reuters