I'm looking for anime/manga/game that really sells the whole "mysterious ancient Japan" vibe. The world should be vaguely sinister, primordial or medieval (without emphasizing the medieval politics), and preferably with supernatural elements.
Doesn't specifically need to be Japan, something like Seirei no Moribito would be fine. Just need to be strongly Asian.
The closest thing I can think of would be Inuyasha, but I already watched that one years ago.
>>354007
drifters, ayakashi japanese horror tales, basilisk, ninja scroll, miyori no mori, katanagatari, and maybe shouwa genroku rakugo
>>354007
Sword of the Stranger, Onigamiden, Uchouten Kazoku, Pom Poko.
Mononoke (not princess mononoke)
>>354007
Mushishi
Mononoke
Princess Mononoke
Shinsekai Yori
Otogizoshi
Y+M
Onikiri Jyuzo
>>354007
You might like Cosmology of Kyoto. It's a Japanese horror visual novel about various stories from Japanese folklore and history.
seconding Mushishi, it's exactly what it sounds like you're looking for