German Foreign Minister Frank-Walter Steinmeier arrived Friday in Tokyo, his first stop in a four-day Asian tour that includes China as well.During his stay, Steinmeier is set to meet with Japanese Prime Minister Shinzo Abe and will also participate in a meeting on the prevention of the spread of nuclear weapons, in the 69th anniversary of bombing of the first atomic bomb in the Japanese city of Hiroshima.The German minister will travel to China on Saturday.