Location from Demon Slayer by Koyoharu Gotouge
A demon-infested mountain wrapped in spider silk — Rui's territory where he forces captured demons to play family in a web-covered nightmare forest.
Mount Natagumo feels wrong before you see a single demon. The forest is too quiet — no birds, no insects, nothing alive that isn't wrapped in silk. The air is cold and damp with a faint chemical smell from the spider threads. Movement at the edges of vision turns out to be puppet-corpses jerked along by invisible strings. Rui's 'family' occupies different territories on the mountain: the Mother controls the outer forest with puppet threads, the Father patrols the mid-section, and Rui sits at the center in a clearing strung with his nearly invisible razor-threads. The mountain is designed as a killing funnel — demon slayers enter the periphery and get separated and weakened before reaching the core. Most Corps members sent to Natagumo before Tanjiro's mission were killed and added to the web.
A forested mountain perpetually shrouded in unnatural mist and webbing. Trees are connected by thick, glistening spider threads that catch moonlight. The silk is everywhere — draped between branches, stretched across paths, coating the forest floor in thin layers. The deeper you go, the denser the webs become. Cocooned bodies hang from branches. The forest canopy is so thick that even daylight barely penetrates, creating a perpetual twilight.
Also known as: Mt. Natagumo, Spider Mountain, Natagumo Mountain