Yagami's works are predominantly comedy shōnen manga with science fiction or high fantasy settings—for example, Dokkoida?!
[2] Many feature protagonists that use martial arts, usually some form of karate, such as Junpei in Those Who Hunt Elves and Shota in Hikkatsu!
[1] Most of his works are published by MediaWorks and serialized in their Dengeki Comic Gao!
(住めば都のコスモス荘・すっとこ大戦ドッコイダー, Sumeba miyako no kosumosu-sō · suttoko taisen dokkoidā), a series of six light novels by Taro Achi published by MediaWorks in the Dengeki Bunko imprint between 1999 and 2003.
Yagami's work in Those Who Hunt Elves is featured prominently in Volume 2 of the popular manga drawing instructional series How to Draw Manga, “Compiling Techniques”.