Kodoku

Kodoku is a single-player survival horror game. Within an otherworld sealed inside a jar, players must gather “Souls” while hiding from relentless, nightmarish creatures.

The protagonist, Urohoshi, a university professor of folklore, journeys deep into the mountains in search of a friend who vanished without a trace—drawn there by a grotesque statue of Kannon. After leaping into a massive jar found at the site, Urohoshi awakens in an otherworld ruled entirely by monsters.