Teito Monogatari
Alternate history has long been a staple of Japanese speculative fiction with such authors as Futaro Yamada and Ryō Hanmura writing novels set in recognizable historical settings withaddded supernatural or science fiction elements. Ryō Hanmura's 1973 "Musubi no Yama Hiroku" which recreated 400 years of Japan's history from the perspective of a secret magical family with psychic abilities. The novel has since come to be recognized as a masterpiece of Japanese speculative fiction. Twelve years later, author Hiroshi Aramata wrote the groundbreaking "Teito Monogatari" which reimagined the history of Tokyo across the 20th century in a world heavily influenced by the supernatural.