Scariest anime you ever watched?

I know a lot of people have watched anime that made them have a hard time sleeping or just that anime that gave them a tiny jump-scare but I wonder what is your scariest anime that you have ever seen in your entire life. I think the one anime in my book that scared me would have to be when they cry. Rena seriously has Master the way of jump-scare. From the visual novel to the anime there is no other anime besides blood-c or corpse party that has me scared to go to sleep.

Devilman's OVA? Shoujo Tsubaki? But they failed to scare me....Reality is more scary than shows...

Himouto! Umaru-chan. It scares me to think people actually like that anime.

I believe Higurashi is the one that did it for me... Not so much of jumpscare, but ugh. Ending of School days, pretty up there too.

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