Hyakki Yakōshō

• Name — Beyond Twilight • Ja Kanji — 百鬼夜行抄 • Ja Romaji — Hyakkiyakō Shō • Genre — Horror, mystery

• Type — manga • Author — Ichiko Ima • Publisher — Asahi Shimbun Publishing • Magazine — * Nemuki (1995–December 13, 2012) • Nemuki+ (April 13, 2013–present) • First — 1995 • Volumes — 32

• Type — drama • Writer — * Jiro Kaneko • Takuro Fukuda • Studio — Nippon TV • Network — Nippon TV, SDT • First — February 3, 2007 • Last — March 31, 2007 • Episodes — 9

• Type — tv series • Title — Hyakki Yakoushou • Director — Saya Fukase • Music — kidlit • Studio — * Imagica Infos • Imageworks Studio • Licensee — Remow • Network — tvk • First — April 7, 2026 • Last — June 23, 2026 • Episodes — 12

• Portal — yes Beyond Twilight is a Japanese manga series written and illustrated by Ichiko Ima. It began serialization in Asahi Shimbun Publishing's manga magazine Nemuki in 1995. After the magazine's disbandment in December 2012, it was transferred to the Nemuki+ magazine in April 2013. A 9-episode television drama adaptation aired on Nippon TV and SDT from February to March 2007. It was also adapted into five drama CDs and two stage plays. A short-form "light anime" television series adaptation produced by Imagica Infos and Imageworks Studio aired from April to June 2026.

Ritsu is a young man who has inherited the ability to see spirits and demons from his late grandfather, a renowned novelist and spiritualist. This "sixth sense" makes Ritsu visible to entities from the spirit world, leaving him vulnerable to good and evil forces. After his grandfather's death, Ritsu loses the protection he once had under his care and forms a contract with a demon guardian known as Blue Storm, whose motives are not always aligned with Ritsu's well-being. The series is structured as a collection of largely self-contained stories, centered on supernatural incidents that arise around Ritsu and Blue Storm.

• Ritsu Ijima • Nobuhiko Okamoto, Haruka Okamura (childhood) • Tsukasa Ijima • Ikumi Hasegawa • Seiran • Hironori Kondō • Kagyuu Ijima • Kazuki Kyan • Kinu Ijima • Marie Miyake • Yaeko Iijima • Miki Natsutani • Sumiko Hidaka • Haruka Okamura • Kana • Eri Akiyama • Ojiro • Nao Shiraki • Okuro • Kohei Yanagi

Written and illustrated by Ichiko Ima, Beyond Twilight began serialization in Asahi Shimbun Publishing's manga magazine Nemuki in 1995. After the final issue of the Nemuki magazine was published on December 13, 2012, the series was transferred to the Nemuki+ magazine on April 13, 2013. Its chapters have been collected into 32 tankōbon volumes as of April 2026. The series was licensed in English by Aurora Publishing, which released the first volume in June 2010 before the publisher folded the same year.

A series of five drama CDs was released by Frontier Works from July 2002 to July 2006.

Two stage play adaptations ran at Hanagumi Shibai between January 2003 and September 2006.

A 9-episode television drama adaptation aired on Nippon TV and SDT from February 3 to March 31, 2007.

A short-form "light anime" television series adaptation was announced by the Nemuki+ X (formerly Twitter) account on February 13, 2026. The series is produced by Imagica Infos and Imageworks Studio and directed by Saya Fukase, with Taeko Miura serving as the sound director and kidlit composing the music. It aired from April 7 to June 23, 2026, on tvk. The ending theme song is "Nani ni mo Narenai" performed by Yangskinny. Remow licensed the series for streaming on the "It's Anime" free ad-supported streaming television (FAST) channel on Samsung TV Plus. Medialink licensed the series for streaming on Ani-One Asia's YouTube channel.