Serial killer Tsutomu Miyazaki went to the gallows Tuesday without ever apologizing or expressing regret for the murders of four small girls in 1988 and 1989.

He made bizarre remarks about his crimes in court and maintained his innocence to the few people he had contact with since being arrested 19 years ago.

Miyazaki abducted four girls aged 4 to 7 in Tokyo and Saitama Prefecture, strangled them and mutilated their corpses. He was arrested in 1989, and his death sentence was finalized by the Supreme Court in 2006 after a 16-year legal battle.