Fuck. me. This is very possibly the scariest game ever made. I'll keep this review short and sweet because you need to go into this game knowing as little as possible.
Let me just say this. You will be startled, creeped out, and chased better than you ever were in any franchise you've ever played. This game makes the Fatal Frame series look like Casper the Friendly Ghost. It just does everything horror right. Perfectly right. If you think I'm kidding...I'm not.
The story is about 5 young adults trying to stop a curse...that's all you need to know. (It's not about the story, really, even though it's interesting.) Yes, the game is only in Japanese. Yes, you will need to softmod your Wii with homebrew to play. Who cares? Mod your Wii. Import this game. And get the shit scared out of you. Now.
Oh, you also use the Wii Balance Board for moving around. You could optionally use the Wiimote to move but why would you do that when you can keep your heart on the verge of an adrenaline-induced cardiac arrest the whole time you play?
Seriously, it is a good work out. My clothes were drenched when I beat this game. With sweat and tears. And probably a little pee.
Bottom line: This game will ruin other survival-horrors for you.