In chapter 18 of the manga Susume! Ikaryaku by Kouta Hirano a group of otaku who are plotting the “terrorist act” of forcing a unilateral meeting of Comiket in opposition to laws and regulations on manga, anime, and gaming, are helped by an old soldier and veteran of the 1960 protests against the ANPO Treaty who remarks that Hara Hara Tokei, “is a dojinshi we used to read”.
Nasu and Takeuchi later formed Type-Moon, and in 2001, featured a portion of the book in their 2001 Tsukihime fandisk, Tsukihime PLUS-DISC, which saw Kara no Kyōkai gain significant popularity, leading it to be released as a dōjinshi publication at Comiket 61 on December 30, 2001.
Due to its simplicity and its liberal license (while it is not open source, royalty-free commercial use is permitted), it quickly became popular in Japan, and was used for a number of high-profile commercial and dōjin titles, such as HaniHani and Tsukihime.
Subaru and his twin sister Hokuto, as well as Seishirō, were first conceived by series creator Nanase Ohkawa for a dōjinshi novel about an onmyōji who hunts elves, of which only the beginning exists.
Takeshi Nogami announced the publication of an anti-Ordinance dōjinshi at Comiket 79, entitled An Idiot's Guide to Tokyo's Harmful Books Regulation.