Divorced, Sugizo has a daughter named Luna Artemis Sugihara, who was born on April 27, 1996 in Tokyo, Japan. In an interview he said that her birth has transformed him the most and "when you love your daughter, you begin to love all children. Although this might sound grandiose, nothing will make me happier than seeing all children around the world lead joyous lives. I'll be more than satisfied if I can become a tool towards that goal". He briefly dated Taiwanese actress Vivian Hsu.