Japanese Prime Minister Naoto Kan has repeated his pledge to make the country less reliant on nuclear energy. He was speaking at a ceremony to mark the 66th anniversary of the dropping of the nuclear bomb on Hiroshima. The function was held at the Hiroshima peace memorial park. In his speech during the service to commemorate the 1945 bombing, Mr. Kan said Japan would examine the causes of this year's nuclear accident at the Fukushima nuclear power plant and aim for a society that would not depend on nuclear power generation.Hiroshima mayor Kazumi Matsui also called on the Government to review its nuclear policies and said the continuing radiation scare had made many people live in fear and undermined people's confidence in nuclear power.Representatives from more than 60 countries, including the United States, attended today's memorial service.The bomb that the US dropped on Hiroshima killed around 140,000 people, either instantly or from radiation burns days later. Another bomb dropped on the port city of Nagasaki three days later killed an estimated 70,000 residents. Japan surrendered six days later.