Suspect is believed to have died of an illness
TokyoReporter
Watches have a value of around 280 million yen, police said
Suspect said, 'I didn't know he was blind'
Girl did not suffer any visible external injuries
Victim was found lying unconscious on her back in their residence on Monday
Suspect said, 'I thought he was just sleeping'
Suspect was found with 3 knives in her possession
Suspect said, 'I intended to use it myself or sell it at bars and clubs in Tokyo'
Police apprehended Rikiya Morita in Niigata Prefecture on October 7
Suspect is accused of suffocating his girlfriend to death