Ichiokunen Shugyou no Mujikaku Kensei

Ichiokunen Shugyou no Mujikaku Kensei ~Tada no Bou da to Baka ni Sareta Bannou no Jinki to • Kyokugen no Shougyou de Umidashita "Kenki" no Jinkaku de Isekai wo Attou suru~ • The Unconsciously Peerless Sword Saint Who Trained for 100 Million Years • 一億年修行の無自覚剣聖〜ただの棒だと馬鹿にされた万能の神器と、極限の修行で生み出した『剣鬼』の人格で異世界を圧倒する〜