Suspect was in possession of a blood-stained knife at the time of his arrest, police said
TokyoReporter
Body was found floating in shallow water of the Katsura River on Monday
The celebrity garnered popularity as a television commentator after a career in the adult video industry
Tampons were unused, police said
Body showed no signs of external injuries, police said
Gender and approximate age of the person are not known, police said
Man was in the possession of a wristwatch and two keys, police said
Judge said, 'It was a vicious crime in which the intent to kill was strong'
Suspect formerly conducted drug-related investigations at the Chuo Police Station in Sapporo
MSDF said, 'We will strive to provide guidance to our staff members in working to prevent a recurrence'