The Hashira, Sanemi and Iguro, along with their comrades head to an abandoned castle on top of a mountain for a mission, while Tanjiro is being treated at the Butterfly Mansion for the wounds he suffered at the Swordsmith Village. Later on, the Hashira gather at the Ubuyashiki Mansion to hold a Hashira meeting, where Muichiro reveals how the marks manifested. In an effort to strengthen the entire Demon Slayer Corps from the bottom up, the Hashira Training begins...
After the castles got worn down
from the Restoration,
،بعد تدهور حالة القِلاع من فترة الإصلاح
Die Burg ist wohl
in Vergessenheit geraten,
Abandonaron el castillo
luego de renovarlo.
Tras la Restauración Meiji,
Le château est si éloigné du village
Da quando il castello 
è stato abbandonato, nell'era Meiji,
Могу предположить, что замок забросили
ещё при реставрации Мэйдзи,
การปฏิวัติเมจิทำให้ปราสาทร้างผู้คนไป