A memorial service for Korean victims of the U.S. atomic bombing of Hiroshima in 1945 was held Monday, with the South Korean consul general calling for improved ties between the two countries.

More than 20,000 people from what is now South Korea are estimated to have fallen victim to the Aug. 6, 1945, bombing, including those who have yet to be identified, as many were forced to come to Japan before and during World War II, according to the Hiroshima head office of the Korean Residents Union in Japan.

During the ceremony at Peace Memorial Park, Consul General Shin Hyong-gun, whose father survived the bombing, said there is increasing hope among South Korean and Japanese citizens for an improved relationship between the two countries.