Aomame, one of Murkami’s protagonists in 1Q84, notices slight differences between the world she is in and the world she knew; one of those differences is the existence of a religious cult, Sakigake (“pioneer” or “pathfinder”). We learn that Sakigake began as a peaceful commune of about 30 members founded in 1974. However, some members with more radical ideology and split, forming the Akebono (meaning “dawn” or “daybreak”) commune. The Akebono commune was destroyed in 1981 after a shootout with Tokyo police. The Sakigake commune carried on but retreated from public eye and grew increasing private and guarded.
Murakami has also written a book (Underground: the Tokyo Gas Attack and the Japanese Psyche) about the Aum Shinrikyo terrorist attack. The religious cult was founded in 1984 but grew to notoriety after they released sarin gas in the Tokyo subways as a coordinated act of terrorism in 1995. This attack killed 13, injured 50, and caused temporary poisoning in over 5,000 others. Afterwards, the Aum Shinrikyo cult split into two factions, with the Hikari no Wa (“Circle of Rainbow Light”) group disavowing the violent actions of Aum Shinrikyo, instead focusing on their spirituality. Regardless, both groups (with Aum Shinrikyo since renamed “Aleph”) are on terrorist watch lists to this day.