The Kimetsu no Yaiba font Turns out they were written by this 84-Year-old calligrapher, Tsunaori Sakaguchi 　 Apart from Kimetsu, he also wrote for many other famous works, such as the Musou series, Japanese drama and even the logo of Gintama (check out the wall behind him)!

Lovely sister thinking Kimetsu characters as real ancestors of the Taishō era 😂 Twitter @ちびた chibi0u0chibi