i took over the academy with a single sashimi knife

“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.