Mouryou
Mouryou is the name for two different beings within the GeGeGe no Kitarou universe, though they're unrelated to each other.
The first is a massive, animalistic youkai featured in the Shonen Magazine story "Mouryou." It's basically a large, beast-like creature that fits the spirit-monster aesthetic the franchise is known for.
The second is completely different—it's not really a single entity at all, but rather a collective of youkai and spirits that bands together in the "Shibito-Tsuki" storyline. So depending on which story you're reading, you're dealing with either one big monster or a whole group of them.
Content compiled by AnimeList.moe from publicly available sources.
