Demon Slayer Warding Masks by Mdwyer5 on DeviantArt
Japanese kitsune mask (2197124)
Traditional Japanese Masks and What They're Used For
Amazon.com: ABYstyle Demon Slayer Kimetsu No Yaiba Tanjiro Warding Mask Ceramic Coffee Tea Mug 11 Oz. Drinkware Anime Manga Merch Gift : Home & Kitchen
Spoiler] Did Tanjiro's warding mask foreshadow the Demon Slayer Mark and its connection to the founder (by way of depicting a Sun)? : r/KimetsuNoYaiba