Hideo Murai (村井 秀夫 Murai Hideo, December 5, 1958 - April 23, 1995) was a member of Aum Shinrikyo and a scientist.
Murai was mortally wounded when an ethnic Korean man named Hiroyuki Jo (徐裕行 Jo Hiroyuki), a member of the Yamaguchi-gumi (the largest organized crime Yakuza group in Japan), stabbed Murai repeatedly, in the presence of 10 police officers and about a hundred reporters recording the events and broadcasting them live. His attacker didn't attempt to flee and was peacefully arrested on the spot. Murai died in an ambulance.
- Nicholas D. Kristof (24 April 1995). "Attacker Fatally Stabs High Official of Japanese Sect". The New York Times. Retrieved 13 April 2013.