Japan executes 'Twitter killer' who murdered nine

Takahiro Shiraishi made contact with his victims on social media then lured them to his apartment.

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The serial killings by Takahiro Shiraishi, dubbed the "Twitter killer", had shocked the country and triggered debate over how suicide was discussed online.

Shiraishi, then 30, lured his victims - most of them young women between the ages of 15 and 26 - to his apartment, before strangling and dismembering them.

The killings came to light in October 2017, when police found body parts in the Japanese city of Zama, near Tokyo, when they were searching for one of the victims.

Warning: Readers may find some details in this story distressing.