Sharpest smoke kitchen knife in the world

Youtube channel Kiwami Japan has made a pure artform out of creating the same video again and again. In each, the silent protagonist creates a kitchen knife, from scratch, from an unconventional material. Here's one made of smoke.

If you watch more than one, while the basic premiss is the same every time, they kind of subtly join together part ASMR, part unfolding surrealist world-building.