Hashira Demon Slayer – the story takes place in Tokyo
Location for Kimetsu no Yaiba in TOKYO: a mapping of characters' birth places and the locations for episodes.
Y's Crow
Hashira 
Focus The Love Hashira Mitsuri Kanroji: Pink and lime green hair comes from rice cakes
Relation between the hair color of Mitsuri Kanroji and Japanese rice cake Sakuramochi
Music/DVD Demon Slayer: Kimetsu no Yaiba Music CD
Opening/Ending songs, background musics and orchestra concert CD listed
Books Demon Slayer: Kimetsu no Yaiba Original Work and Related Books
English books of Demon Slayer: Must have Art Collection, Illustration Collection, Comics Vol.1-23
Background The Entertainment District of The Taisho Period
The facts on Yoshiwara Yukaku, Oiran, Taisho Secret of Gyutaro and Daki explained
Focus The Sound Hashira Tengen Uzui from a family of SHINOBI
The past of The Sound Hashira Tengen Uzui and SHINOBI (Ninja) explained
Hashira Why are there 9 Hashira in Demon Slayer: Kimetsu no Yaiba?
The reasons of the number "9" and the difference of Hashira's Nichirin Blade explained.
Focus Taisho Secret: Yellow and Red Hair of The Flame Hashira Kyojuro Rengoku
The Rengoku House and the reason for the hair color of Kyojuro Rengoku explained
Background The Patterns of Demon Slayers’ Clothes have meanings
Japanese traditional patterns explained: which pattern means prosperity, fortune, protection and social success?
Key facts Breathing Techniques in Demon Slayer: Kimetsu no Yaiba
WATER and FLAME as basic breathing and others as branch out? Mystery of HINOKAMI KAGURA.