Yoriichi Type Zero is destroyed at the end of Tanjiro's training, but a sword from over 300 years ago appears from inside. Kotetsu gives Tanjiro the sword, however it is badly rusted. At that moment, Haganezuka appears and takes the sword with him to perform a grueling whetting process handed down within his family line. Meanwhile the presence of demons are inching closer to the village...
I should've known that a mountain swordsmith's
flesh would be unfit for consumption!
كان عليّ أن أعرف أنّ لحم حدّادي 
!سيوف الجبل لن يكون مناسبًا للأكل
Das Fleisch eines ländlichen Schwertschmieds
ist doch wirklich ungenießbar!
Ya me temía que la carne de los herreros
no iba a agradar a mi delicado paladar.
La carne de herrero de montaña
no vale un pimiento.
Je me doutais bien que la chair
de forgerons montagnards serait infâme.
मुझे पता होना चाहिए था कि
Niente da fare, la carne dei forgiatori 
di montagna è davvero disgustosa!
Eu devia saber que carne de ferreiro das 
montanhas não é própria para consumo.
Я так и знал, что мясо горцев-кузнецов
даже на зуб пробовать не стоит.