January 2, 1942 - Gen Sekine

Gen Sekine (関根元, Sekine Gen; 2 January 1942 – 27 March 2017) was a Japanese dog breeder and serial killer who, together with his common-law wife Hiroko Kazama (風間博子), murdered at least four clients in Kumagaya, Saitama Prefecture, between April and August 1993. Both were sentenced to death for their crimes, but Sekine died on death row prior to execution.

Content sourced from en.wikipedia.org/wiki/Gen Sekine under CC BY-SA 4.0.