Jimi na Kensei wa Soredemo Saikyou desu  

The Simple-Looking Sword Saint is Nevertheless the Strongest, 地味な剣聖はそれでも最強です, The Worlds Least Interesting Master Swordsman, 地味な剣聖はそれでも最強です, The World's Least Interesting Master Swordsman, Jimi na Kensei Sore Demo Saikyou desu

A Japanese student named Shirokuro Sansui passed away due to a divine error and was transported to another realm. He aspired to become the most powerful being, so he received a letter from God addressed to a sage, along with 500 years of training. After mastering his craft, he encountered a baby near his training grounds, marking the beginning of his journey in this new world. Despite having simple techniques and appearing unassuming, Sword Saint is incredibly strong. Armed with an ordinary wooden sword, his battle against evil has only just begun.

Jimi na Kensei wa Soredemo Saikyou desu has been published digitally in English as The Worlds Least Interesting Master Swordsman by J-Novel Club since February 1, 2020.