"If I slash, it will be cut."

I, who was once called the best swordsman in the nation, have ended up in a mobile game I've only spent money on a few times. And I've even received the blessing of the Sword God! But... the only weapon I can use is a sashimi knife? Just one minute a day. I become a Sword Saint with a sashimi knife.

(Source: Naver Corporation, translated)