Five males, including a high school student, confessed Monday to killing a 16-year-old girl and were arrested for allegedly torching the victim's body.
The burned body of Yuko Ishibashi was found in a cemetery parking lot in the city of Chiba on Oct. 1.
Police allege that Hironobu Ishibashi, 22, and four boys ranging in age from 16 to 18 burned the body.
Hironobu Ishibashi acquired the victim's last name after registering his marriage with her in July. Investigators said they suspect Hironobu registered his apparently bogus marriage with Ishibashi so he could borrow money from consumer credit companies under a new name.