Higurashi no Naku Koro ni, Mayoiga Recommendations
The both have Psychological experiments as a premise.
They take place in a mysterious village tucked in the middle of nowhere
similar themes of ghosts, characters with strange personalities, and legends
-Mysteries around a small village
-Cute girls being creepy
-Human psyche being tested
Booth shows start somewhat normal, until things start to get downright creepy.
Both Mayoiga and Higurashi have an eerie atmosphere.
Booth villages (Hinamizawa in Higurashi / Nanakimura in Magyoiga) are quite mysterious.
The characters are also not what they seem at first.
Probably the most similar show: the uneasy atmosphere is present in both of us.
Mayoiga and Higurashi are set in a mysterious village (Nanaki and Hinamizawa), filled with many legends (the Onigafuchi myth and the legends about Nanaki) and both of them include a creepy folksong.
In both of them, all the characters try to hide their unclear past and in both of them, the main character is not from the village...
I have only watched the episodes out at the time of wright this but from what I have seen so far both this series and Higurashi seem very similar in tone.
While I was watching the first episode, Mayoiga was remembering me all time Higurashi no Naku Koro ni (also Shiki, but it's most paranormal). Both series happen in a world apart village, with very characters, deaths, mystery, the main characters isn't from this village, crazy people... If you like the "genre" strange villages, it will like you.