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...
Whatever you do for others
comes around to help you, as well, in the end.
كلّ ما نفعله للآخرين يعود بالنّفع 
.علينا أيضًا في النّهاية
Wer Gutes für andere tut, auf den wird
am Ende auch Gutes zurückfallen.
Ayudar a los demás, a fin de cuentas,
regresa a uno mismo para bien.
Al final, ayudar a los demás
Quand on aide les autres,
on a plus de chance qu’ils nous aident.
जब तुम दूसरों के लिए कुछ करते हो,
तो अंत में, तुम्हें भी मदद मिलती है।
Beh, aiutare gli altri
Todo o bem que fazemos pelos outros
um dia será feito por nós.
Если делаешь другим добро,
когда-нибудь оно к тебе вернётся.