Taro Aso was speaking at a seminar for his faction in the ruling Liberal Democratic Party on Tuesday when he said: "I don't question a politician's motives; it is delivering results that matter. Hitler, who killed millions of people, was no good, even if his intentions had been good."
Aso said that remark was "inappropriate" and he would like to retract it and regretted having caused a misunderstanding. He said he meant that Hitler was a bad leader with bad intentions.
Aso is also the finance minister in Prime Minister Shinzo Abe's Cabinet and served as Japan's prime minister in 2008-9. Japan's chief cabinet secretary, Yoshihide Suga, said after Aso retracted his statement that the deputy prime minister "should make his own explanation when the time comes."
Aso in 2008 was criticised for comparing the tactics of the Democratic Party of Japan to those of Nazis in 1930s Germany.