In literature, Chinzuka Kaiō is known chiefly from Toriyama Sekien’s Hyakki Tsurezurebukuro image, with no concrete deeds or sayings recorded. The painting shows a strongly muscled, red-hued oni prying open a kara-bitsu chest as dust and paper scraps swirl. Sekien appended a note calling it the “chief of the mountain hags formed from piled-up dust,” echoing the Noh play Yamanba’s line “clouds’ dust piles up and becomes a mountain hag.” However, no tradition directly links this yokai to Yamanba, leaving its placement ambiguous. Similar images appear in Meiji-era copies and anonymous picture scrolls, sometimes renamed as “kaiki” (monstrous oni). Since the Heisei era, some explain it as “king of dust and garbage tsukumogami,” but this is a later interpretation without proof in older sources. Iconographically, it is viewed as an early modern creation merging the “splitting the treasure chest” motif from Night Parade of One Hundred Demons scrolls with phrasing quoted from Essays in Idleness.