A sequel, The Tatami Time Machine Blues (四畳半タイムマシンブルース, Yojōhan Taimu Mashin Burūsu), was published in 2020, which combines the characters of The Tatami Galaxy with the plot of Makoto Ueda's play and film Summer Time Machine Blues.

The Tatami Galaxy was adapted into an 11-episode anime television series produced by Madhouse and directed by Masaaki Yuasa, which aired on Fuji TV's late-night Noitamina programming block in 2010.

An original net animation adaptation of The Tatami Time Machine Blues produced by Science Saru premiered in September 2022 on Disney+.

The majority of the series' episodes follow the same basic structure: the protagonist joins a circle as a freshman, but is disillusioned when the activity does not lead to the idealized "rose-colored campus life" he dreamed of.

He encounters a fortune teller, who cryptically informs him of an opportunity "dangling" in front of his eyes; this prompts him to remember a mochiguman keychain lost by Akashi and recovered by the protagonist, which he leaves hanging from a pull switch in his apartment and perpetually forgets to return to her.

[7] Morimi's 2006 novel The Night Is Short, Walk On Girl serves as a spiritual successor to Tatami Galaxy, with a shared setting and some recurring characters.

The series, later revealed to be an original net animation (ONA), is produced by Science Saru, directed by Shingo Natsume and written for television by Makoto Ueda, with character designs by Yusuke Nakamura, music composed by Michiru Ōshima, and the majority of the original Japanese voice cast reprising their roles.

[24] Night Is Short, Walk On Girl, a feature film and spiritual sequel to The Tatami Galaxy, based on the novel of the same name, was released by Toho on April 7, 2017.

[25] The Tatami Galaxy won the grand prize in the animation category at the 14th Japan Media Arts Festival on December 8, 2010, making it the first television series to win the award, with the jury describing the series in their justification as a "richly expressive work that turns the limitations of TV on its head" and complimenting its "unique scene layouts, characters' actions and color scheme.