Suspect repeatedly punched and kicked his 23-year-old teacher during class
Posts published in September 2017
Victim was found bleeding from two stab wounds to the left side of his chest
Two corpses were subsequently discovered in the driver's and passenger seats of the vehicle
Suspect told police, 'I did it after becoming irritated by the annoying voices of the children'
Suspect had visited police station on multiple occasions to lodge complaints about family problems
Suspect told police, 'I was interested in little boys'
Suspect wielded a knife in front of two female part-time employees while demanding money
Victim collapsed at the entrance of a residence with blood flowing from his head
Suspects allegedly demanded money from the woman and hurled beer bottles at her inside a karaoke parlor
Operation is believed to have collected ¥77 million in revenue since 2013