Tanjiro encounters Mist Hashira Muichiro Tokito and Kotetsu, a boy from the village, arguing. Muichiro is demanding that a "certain key" be handed over to him from Kotetsu. Being unable to look on in silence, Tanjiro intervenes to speak on behalf of Kotetsu, however Muichiro refuses to listen. According to Kotetsu, the key is used to operate a battle-type Mechanical Doll, Yoriichi Type Zero, that mimics the movement of a certain real-life swordsman...
The technology's so mind-blowing,
we can't catch up to it today.
التّقنيّة الّتي صُنعت بها تدهش الأذهان
.ولا يمكننا تداركها حتّى اليوم
Die Technik dahinter ist unglaublich.
Keiner bei uns im Dorf versteht sie wirklich.
Fue creado con una gran ingeniería,
a la que nosotros ni nos acercamos.
La technique est si avancée
qu’on est incapables de la recréer.
वह तकनीक इतनी शानदार है
कि आज हमें वह समझ ही नहीं आती है।
È stata fatta con una tecnica straordinaria.
Essa tecnologia é incrível, hoje 
mesmo nós não conseguimos acompanhar.
Она сделана столь искусно,
что и сейчас не воспроизведёшь.