He confessed to having killed four girls, aged between four and seven, in
He sent letters to the media under a woman's name claiming responsibility for the crimes and sent a box containing the remains of a slaughtered girl to her family.
"The atrocious murder of four girls to satisfy his sexual desire leaves no room for leniency," Chief Justice Tokiyasu Fujita said in January 2006 when he upheld his death sentence.
"The crime is cold-blooded and cruel," he said.
When police arrested
During the nearly two-decade judicial process,