Books

• Summer, Fireworks and My Corpse (Shueisha:ISBN 4087030520, Shueisha bunko:ISBN 4087471985)
• Summer, Fireworks and My Corpse
• Yuko
• Tentei Y?ko (Shueisha: ISBN 4087030709, Shueisha bunko: ISBN 4087473422)
• A Masked Ball - Or, the appearance and disappearance of the bathroom smoker
• Tentei Y?ko
• Ishi no Me (Shueisha: ISBN 4087020134)/Heimen Inu (Shueisha Bunko:ISBN 4087475905)
• Ishi no Me
• Hajime
• Blue
• Heimen Inu
• Ankoku Dowa (Shueisha: ISBN 4087020142, Shueisha Bunko: ISBN 4087476952)
• Shinizokonai no Ao (Gentosha Bunko: ISBN 4344401638)
• Kurai tokoro de machiawase (Gentosha Bunko?ISBN 4344402146)
• Goth Wristcut Case(Kadokawa Shoten:ISBN 4048733907)
• Goth
• Wristcut
• Dog
• Twins
• Grave
• Voice
• Goth Wristcut Case Yoru no Sho (Kadokawa Bunko: ISBN 4044253048)
• Goth
• Dog
• Twins
• Goth Wristcut Case Boku no Sho (Kadokawa Bunko: ISBN 4044253056)
• Wristcut
• Grave
• Voice
• Shisso Holiday (Kadokawa Sneaker Bunko: ISBN 4044253013)
• Happiness is a Warm Kitty
• Shisso Holiday
• Calling You (Kadokawa Sneaker Bunko: ISBN 4044253021)
• Calling You
• Kiz/Kids
• Flower Song
• Samishisa no Shuhas?(Kadokawa Sneaker Bunko: ISBN 404425303X)
• Mirai Yoho Ashita, Harereba ii
• Te o Nigiru dorobo no Monogatari
• Film no naka no Shojo
• Ushinawareta Monogatari
• Zoo(Shueisha: ISBN 4087745341
• Kazari to Yoko
• Ketsueki wo Sagase!
• Hidamari no Shi
• So-far
• Tsumetai Mori no Shiroi Ie
• Closet
• Kami no Kotoba
• Zoo
• Seven Rooms
• Ochiru hikoki no Naka de
• Zoo 1 (Shueisha Bunko: ISBN 4087460371)
• Kazari to Yoko
• Seven Rooms
• So-far
• Hidamari no Shi
• Zoo
• Zoo2 (Shueisha Bunko: ISBN 408746038X)
• Ketsueki wo Sagase!
• Tsumetai Mori no Shiroi Ie
• Closet
• Kami no Kotoba
• Ochiru Hikoki no Naka de
• Mukashi Yuhi no K?en de
• Not included in the original edition of Zoo...originally appeared on Otsu-Ichi's now defunct website.
• Kutsushita wo Kakuse! (Koubunsha: ISBN 433492414X)
• So far, his only picture book
• Ushinawareru Monogatari (Kadokawa Shoten: ISBN 4048735004, Kadokawa Bunko: ISBN 4044253064)
• Calling You
• Ushinawareru Monogatari
• Kiz/Kids
• Te wo Nigiru Dorobo no Monogatari
• Happiness is a Warm Kitty
• Maria no Yubi
• Boku no Kashikoi Pantsu-kun
• Only in bunko edition:
• Usokano
• Kosei Monokagatari (Gentosha: ISBN 4344006550)
• Collection of essays written for the web
• Toruko Nikki ~ Dame Ningen Sakka Trio no Datsuryoku Tabi Nikki~ (Shueisha: ISBN 4087804240)
• Serialized on the web, heavily revised; in tandem with Shinji Sadakane and Makoto Matsubara.
• Gun and Chocolate (Kodansha Mystery Land: ISBN 406270580X)

Uncollected Stories

• Ugoku Omocha (Shosetsu Subaru)
• Tsuma no Denwa (Shosetsu Subaru)
• Kamikakushi (Shosetsu Subaru
• Shufuku sareta Mizu (Da Vinci)
• F-Sensei no Pocket (Faust)
• Kodomo ha T?ku ni Itta (Faust)
• Dare ni mo Tsuzukanai (Faust)
• A relay novel written with Takekuni Kitayama, Yuya Sato, Tatsuhiko Takimoto and Nisio Isin.
• Mado ni fuku Kaze (Faust)
• Utopia (Light novel wo kaku!)
• Dankai (Akumu seigyo Souchi horror anthology)
• Kono ko no e wa Mikansei (Nanatsu no Kuroi Yume)

Scripting/planning

• Hajime (Weekly Shonen Jump)
• Script. Art by Takeshi Obata. Two part short story, appeared in Jump in 2003.
• Misshitsu Kanojo (2006, gekidan, Yukiko Mototani)
• Planning. Not published, but his plot in script for was distributed at performances.
• Shonen Shojo Horyuki (Shosetsu Subaru)
• Script. Art by Usamaru Furuya.

Movies

• Nikako no Hitomi(2002)
• Directed by Keisaku Sato. Script by Keisaku Sato and Hirotaka Adachi.
• Pool de Oyoda Kaerimichi (2002)
• 5 minute long short film. Written and directed by Hirotaka Adachi.
• Rittai Tokyo (2007)
• Scheduled to be shown at the Yubari Ouen Eigasai. Directed by Hirotaka Adachi.

Jojo's Bizarre Adventure novelization

• Jojo's Bizarre Adventure The Book: 4th Another Day.

Adaptations   more   less