is a Japanese light novel series written by Rokurō Akashi and illustrated by Shiso. It began serialization on the user-generated novel publishing website Shōsetsuka ni Narō in August 2017. It was later acquired by Shufu to Seikatsu Sha who published it under their PASH! Books light novel imprint from May 2018 to October 2025. A manga adaptation illustrated by Appe began serialization on Shufu to Seikatsu Sha's Comic PASH! website in May 2018.
Media Light novel Written by Rokurō Akashi, The World's Least Interesting Master Swordsman began serialization on the user-generated novel publishing website Shōsetsuka ni Narō on August 21, 2017. It was later acquired by Shufu to Seikatsu Sha who published eleven volumes with illustrations by Shiso under their PASH! Books imprint from May 25, 2018, to October 3, 2025.
During their Anime NYC 2019 panel, J-Novel Club announced that they licensed the light novels for English publication.
Manga A manga adaptation illustrated by Appe began serialization on Shufu to Seikatsu Sha's Comic PASH! website on May 25, 2018. The manga's chapters have been collected into twelve volumes as of October 2026.
Reception By April 2022, the series had over 880,000 copies in circulation.
See also Oh Boy, Was I Wrong About Her, another light novel series with the same illustrator
References
External links at Shōsetsuka ni Narō