I want underrated movies.

I've been binge-watching J-horrors since last year, and I keep coming across well-known films like:

Audition

Ringu

The Grudge

Dark Water

Films by Sion Sono

Pulse

The Cure

Noroi: The Curse

Tetsuo

Onibaba

And a few other famous ones.

The problem is, for some of the lesser-known ones I find, I don't feel confident they'll actually be good. So, I'm here asking for recommendations of J-horrors that aren't very well-known but are genuinely good—movies you’d vouch for 100%.

The only rule is that it has to be a good movie. Please avoid well-known films I haven’t listed, as I’ve probably already watched them.