Prime Minister Fumio Kishida is set to visit Hiroshima with U.S. Ambassador to Japan Rahm Emanuel on Saturday, a Japanese government source said Wednesday.

Emanuel, once a top aide to former President Barack Obama, who visited Hiroshima in 2016, and Kishida, a lawmaker representing a constituency in the city, will offer prayers and flowers to those who suffered the U.S. atomic bombing in 1945, at the Hiroshima Peace Memorial Park on Saturday, according to the source.

They are expected to underscore the unity of the two countries in opposing any move by Russia to use nuclear weapons in its invasion of Ukraine since Feb. 24, as Russian President Vladimir Putin has hinted at using them in the face of Ukraine's resistance and severe economic sanctions from Western nations.