About Daiakuji

Set in alternate universe Earth where feminist America wins World War II, Japan is occupied by American forces and the occupation is later delegated to local female-only peacekeeping forces. The protagonist, the son of a criminal syndicate boss, returns home after being released from imprisonment (as a POW), a home he no longer recognizes partly due to new matriarchal constitution.

(description adapted and summarized from Alice Soft wikia)