https://en.wikipedia.org/wiki/Azumi_Muto

https://s-a-ozbourne.medium.com/he-killed-dismembered-and-hid-his-sisters-body-in-his-room-43e00bbf790a

https://www.japantimes.co.jp/news/2007/01/06/national/students-sister-died-violent-death/

https://imagelinkglobal.com/products/ILEA000661615/