Demon Slayer: Kimetsu no Yaiba

[Buffalobiian]

The asspull part is the fact that we were never shown this training prior to it being mentioned this episode, especially because he didn't seem to know anything about breathing techniques until mask-sensei taught him.

The translation said this: "Tanjiro, if nothing else make sure this kagura and these earings get passed down to you uninterrupted. That's what I promised."

The logical thing for me is to assume that a single word is missing from "if nothing else I'll make sure..." rather than assume the rest of the line required multiple changes instead.

All that meant to me was that his father intended to pass it on. Whether he did or didn't before he died was an unknown, and all I could see what that Tanjiro had observed some movement.