Born in Tokyo. Graduated from Aoyama Gakuin University, Faculty of Letters, French Literature. Worked for clothing companies, hospitals, publishers, etc. and started writing after retiring and raising children. In 1995, "RIKO - goddess of eternity" won the 15th Masafumi Yokomizo Award. In 1998, "Cut Smile" was selected as a candidate for the 51st Mystery Writers of Japan Award In 2001, “For Your Pleasure” was selected as a candidate for the 54th Mystery Writers of Japan Award . He lived in Kyoto for 20 years, but has lived in Kanagawa since 2004 .