The 7-fascicle edition has a postscript dated 1245 that mentions the Buddhist monk Ogawa Shōchō 小川承澄 (1205-1281 CE), but does not clarify his editorial role.
The 20-fascicle edition records the Kamakura Period court noble Sugawara no Tamenaga (菅原為長, 1158-1246 CE) as the dictionary editor.
"Compared to the last preceding similar dictionary, the twelfth-century Ruiju Myōgishō," writes Bailey, "it is a greatly Japanized work.
They begin with Tenshō (天象 "astronomical phenomena") and end with Jiji (辞字 "miscellaneous 1-character words"), with one change: Iroha Jiruishō headings 8 and 9, Inshoku (飲食 "foods, drinks") and Zatsubutsu (雑物 "miscellaneous things"), are combined into Jikyōshū heading 8 Zatsubutsu.
The modern Mojikyo computer font software includes character data from the ancient Shinsen Jikyō and Jikyōshū.