[3] Buoyed by this success, Asahi Sonorama launched two special issues of Monthly Halloween in the early 1990s, Nekumi and Honkowa, which were later spun off into independent publications.

"Strange Stories of Sleepless Nights"), most commonly known by its abbreviation Nemuki (ネムキ), is a bimonthly magazine that began as a special issue of Monthly Halloween in 1990.

[7] It publishes fantasy manga in addition to horror, with stories that aim to be "more ambitious, sensitive and mature" than those of Monthly Halloween.

"Scary Stories That Really Happened"), most commonly known by its abbreviation Honkowa (ほん怖), is a bimonthly magazine that began as a special issue of Monthly Halloween in 1991.

This prompted Asahi Sonorama to publish a special issue of the magazine dedicated to stories inspired by true events, which was successful enough to be spun off into its own publication.