Someone posted a thread about hidden instances in the game. This is a description on the Kappa and their love of human colons. In Nioh 2, when they grapple you, they appear
Steam Community :: Screenshot :: :Kappa:
The Kappa Shell core is one of my favs : r/Nioh
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Category:Enemies | Nioh Wiki | Fandom
Nioh - Kappa giving William a traditional Japanese Wedgie - YouTube
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The Sunomata Yokai Hunt | Nioh 2 Wiki
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Nioh 2 Yokai, Loosely Ranked by How Much I Hate Them – Welcome to infinitefreetime dot com