Tatami Pioneering Diary 04
| Volume Title | Tatami Pioneering Diary 04 |
| Japanese Volume Title | 四畳半開拓日記 04 |
| Light Novel | Yojouhan Kaitaku Nikki |
| Publisher | ASCII Media Works |
| Light Novel Label | DENGEKI |
| Author | Nana Nanana |
| Illustrator | Hatena to Kinoko |
| Volume | 4 |
| Release Date | October 17, 2020 |
| Pages | 388 |
| ISBN-10 | 4049132109 |
| ISBN-13 | 978-4049132106 |
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