The Tatami Galaxy
2004 Japanese varsity novel written by Tomihiko Morimi and published by Ohta Publishing
The Tatami Galaxy (Japanese: 四畳半神話大系, Hepburn: Yojōhan Shinwa Taikei; lit. "4½ Tatami Mythological Chronicles") is a 2004 Japanese varsity novel written by Tomihiko Morimi and published by Ohta Publishing. Its first-person narrator is an unnamed upperclassman at Kyoto University reminiscing on the misadventures of his previous years of campus life, with each of the four chapters taking place in parallel universes in which he is enrolled in a different student society.
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. English translations of both novels were published by HarperCollins in December 2022 and November 2023, respectively.
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. The adaptation was critically acclaimed, winning the 2010 Japan Media Arts Festival Grand Prize in the Animation Division and the 2011 Tokyo Anime Award in the Television Category. An original net animation adaptation of The Tatami Time Machine Blues produced by Science Saru premiered in September 2022 on Hulu in the United States and Disney+ internationally.
Plot
The Tatami Galaxy follows an unnamed third-year student at Kyoto University, using parallel universes as a plot device to explore how his life would have differed had he joined a particular student society (called a "circle" in Japan). The original novel follows four different timelines.
The public source identifies “The Tatami Galaxy” as 2004 Japanese varsity novel written by Tomihiko Morimi and published by Ohta Publishing. This brief keeps that definition visible, then builds a research path around Tatami, Galaxy and Japanese.
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Reception evidence should be dated and situated: later canonical status may differ sharply from the work’s initial circulation. The source revision retrieved here is dated Sep 5, 2026. The linked authority identifier is Q1134458. 1 of 1 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 2004, 2020, 2022 and 2023.
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This entry incorporates text from “The Tatami Galaxy” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.