General MacArthur convened the International Military Tribunal for the Far East also known as the Tokyo Trials which found 28 high-ranking political and military leaders guilty of crimes against peace, conventional war crimes, and crimes against humanity.
Starting in 1966, the Yasukini Shrine, where Japanese leadership pay homage to war dead annually, began enshrining the 14 Class A and 1,000 Class B and C war criminals.
Japanese denialists of war atrocities have opposed the findings of the Tokyo Tribunal as “victors” justice and continue to refuse reparations for the victims of the war including “comfort women” numbering between 20,000 and 410,000 women (the number is uncertain because the Japanese military destroyed or refused to disclose their records) of mostly Korean and Chinese descent who were enslaved and raped by the Japanese military. The system of Japanese military brothels were set up as a way of avoiding what happened in the Rape of Nanking. It is believed that 90% of these women died. Survivors have been seeking apologies and reparations from the Japanese for decades.
Shinzo Abe, the former Prime Minister of Japan, is the grandson of Nobusuke Kishi who was imprisoned as a suspected Class A war criminal but was released by the US.
https://www.wsj.com/articles/for-japans-shinzo-abe-unfinished-family-business-1418354470