Four girls missing since the weekend were found unharmed Thursday at a condominium in Tokyo's Akasaka district, police said.
A man who was later identified as 29-year-old Kotaro Yoshisato of Yokohama was found dead in the condo, they said.
It is believed that Yoshisato committed suicide, as he was found sitting on a chair with a tentlike structure made from plastic sheets covering him and a charcoal burner at his feet, police said. He had no external injuries and appeared to have been dead for more than 10 hours when he was found, they said.
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