For some reason, plenty of Americans overlooked Japanese and Korean cinema. Truthfully, they're the best at it. Sure, other countries have some iconic horror films, but Japan and South Korea definitely take the cake in the industry.
Parasite was fantastic and worthy of the Oscar win so much so that people are wondering what else South Korea has to offer. South Korean's do not hold back, so be prepared.
Train To Busan (2016)
A train filled with zombies, what's scarier than that? A man and his daughter board a train with a secretly infected person, and things only get worse from there. This film is a fantastic take on a zombie plague with the added horror of being trapped in a high-speed train.
A Tale of Two Sisters (2003)
This supernatural and psychological horror film revolves around two young sisters. One of them is being treated at a mental asylum while the other is stuck at home with her father and stepmother. When the older daughter gets back from the asylum, she begins to get visions of her dead mother. She knows that something is terribly wrong, and her stepmother is definitely behind it all.
I Saw the Devil (2010)
A serial killer takes the wrong victim when he kills the fiance of a revenge-driven maniac. The main character is psychopathic and gets his revenge in tiny, intense increments. This film is super gruesome and extremely violent, so it's not for the faint of heart.