Pope to visit Hiroshima on anti-nuclear weapon mission

Pope Francis, who years ago hoped to be a missionary in Japan, travels to the sites of the world's only atomic attacks this week seeking a ban on nuclear weapons.

The Argentine pontiff, 82, flies to Asia on Tuesday, where he will first visit Thailand and then Japan, including the two cities destroyed by devastating US nuclear attacks during the Second World War.

Despite both countries having less than 0.6 percent Catholic populations, Francis is thirsty for interreligious dialogue with them.

He will arrive in Thailand on Wednesday before flying on to Japan on Saturday, where he will stay until November 26.

Sunday is set to be a marathon day with visits to Nagasaki and Hiroshima, where at least 74,000 people and 140,000 people respectively were killed by the atomic bombs attacks.

The August 6, 1945 bombing of Hiroshima and of Nagasaki three days later contributed to Japan's surrender and the end of the Second World War on August 15, months after Nazi Germany capitulated.

Father Yoshio Kajiyama, director of the Jesuit social centre in Tokyo, was born in Hiroshima shortly after the war and is eagerly awaiting the pope's anti-nuclear speech.

"My grandfather died the day of the bomb in Hiroshima, I never knew him. Four days later my aunt died when she was 15 years old," said the 64-year-old.

"If you grow up in Hiroshima, you can't forget the bomb."