From BBC:
The leader of Aum Shinrikyo doomsday cult which carried out a deadly nerve gas attack on the Tokyo underground in 1995 has been executed, Japanese media report.
The sarin attack, Japan's worst terror incident, killed 13 people and injured thousands more.
Seven other Aum Shinrikyo members are also awaiting execution.
What is the Aum Shinrikyo cult?
The cult, whose name means "supreme truth", began in the 1980s as a spiritual group mixing Hindu and Buddhist beliefs, later working in elements of apocalyptic Christian prophesies.
The group's founder, Shoko Asahara, also known as Chizuo Matsumoto, declared himself to be both Christ and the first "enlightened one" since Buddha.