38 titles- Atashi no Naka no ... ["Inside Me ..."] (Tokyo: Kisō Tengai-sha, 1978)
- Itsuka Neko ni Naru made ["Until the Day I Become a Cat"] (Tokyo: Shūeisha Cobalt, 1980)
- Shū ni Ichido no Shokuji o ["Meals Once a Week"] (Tokyo: Shūeisha Cobalt, 1980)
- Hoshi e Iku Fune (Tokyo: Shūeisha Cobalt, 1981)
- Hitome Anata e ["To You, At a Glance"] (Tokyo: Shūeisha Cobalt, 1981)
- Green Requiem (Tokyo: Kisō Tengai-sha, 1983)
- Calendar Girl (Tokyo: Shūeisha, 1983)
- ... Zekku ["... Speechless"] (Tokyo: Hayakawa Shobō, 1983)
- Black Cat (Tokyo: Kisō Tengai-sha, 1984)
- Green Requiem (Tokyo: Kōdansha English Library, 1984)
- A Ship to the Stars (Tokyo: Kōdansha English Library, 1984)
- Labyrinth (Tokyo: Tokuma Shoten, 1984)
- Tobira o Akete ["Please Open the Door"] (Tokyo: CBS Sony, 1984)
- Hideo to Motoko no Ai no Kōkan Nikki ["Hideo and Motoko's Love Exchange Diary"] (Tokyo: Kadokawa Shoten, 1984)
- Anata ni Koko ni Ite Hoshii ["Wish You Were Here"] (Tokyo: Bunka Shuppan, 1984)
- Knight Fork (Tokyo: Shūeisha, 1985)
- Aishiteru kai SF ["Do You Love SF?"] (Tokyo: Shapio, 1985)
- Neverland Party: Arai Motoko to Jugonin no Mangaka ["Neverland Party: Motoko Arai and 15 Manga Artists"] (Tokyo: Shinshokan, 1985)
- Arai Motoko no Science Odyssey ["Motoko Arai's Science Odyssey"] (Tokyo: Shinshokan, 1985)
- Kekkon Monogatari ["Wedding Story"] (Tokyo: Kadokawa Shoten, 1986)
- Sakaurami Nemesis ["Mutually Hostile Nemesis"] (Tokyo: Shūeisha, 1986)
- Shinkon Monogatari ["Honeymoon Story"] (Tokyo: Kadokawa Shoten, 1986)
- Soshite, Hoshi e Iku Fune ["And Then ... A Ship to the Stars"] (Tokyo: Shūeisha Cobalt, 1987)
- Arai Motoko no Hatena Kyōshitsu ["Motoko Arai's Q+A Classroom"] (Tokyo: Tokuma Shoten, 1987)
- Ima wa mō Inai Watashi e ["To The Me That Is No More"] (Tokyo: Tairiku, 1988)
- Midori Gensō: Green Requiem II (Tokyo: Kōdansha, 1990)
- Black Cat (Tokyo: Kōdansha English Library, 1991)
- Hoshi Kara Kita Fune ["A Ship From the Stars"] (Tokyo: Shūeisha, 1992)
- Castling (Tokyo: Shūeisha, 1994)
- Tigris to Euphrates ["Tigris and Euphrates"] (Tokyo: Shūeisha, 1999)
- Happy Birthday (Tokyo: Kadokawa Shoten, 2002)
- Checkmate (Tokyo: Shūeisha, 2003)
- Shiki no Hanashi ["Tales of the Seasons"] (Tokyo: Booking, 2005)
- Chiisa na Ohanashi ["Little Stories"] (Tokyo: Shūeisha, 2007)
- Mo Ichido Anata to Aitai na ["Want to See You One More Time"] (Tokyo: Shūeisha, 2010)
- In the Heaven (Tokyo: Shinchōsha, 2013)
- Mirai e ... ["Towards the Future"] (Tokyo: Kadokawa Shoten, 2014)
- Jinkō Chinō Miru Yume wa AI Short-Short Shū ["AI is the Man-Made Sentient Dream: Short-Short Collection"] (Tokyo: Bungei Shunjū, 2017)