The details about the origin of kasujiru are not known, but it has been popular for a long time in Nara, where the god of sake is worshiped, and Kyoto including Fushimi, which is famous for its production of sake.
起源詳細は不明だが、酒の神様の祭られている奈良や酒どころ伏見のある京都では古くから広く親しまれている。