There was an English version being made, but it got into development hell and unfortunately was never released. There is a fan translation, but it's really... Engrish and not very good. I do hear a group is working on making a better English patch for the game finally though.
I will say to anyone who wants to play the game that it starts off fairly mild on scares, but it only gets more so and more so as you get further and further into the game and more crazy elements start piling up on each other.
It's also amazingly like Amnesia considering it came out ten years prior. I have this sneaking suspicion that Frictional took a bit of inspiration from this game in some aspects, but I have no proof behind that claim besides some of what Amnesia does is very similar to this game, but I feel this game pulls it off better with far more variety. However, like Amnesia, immersion is key and it might be harder to do since the graphics for the game are, as said, outdated.
Also, since no one has mentioned it here, I'll bring up the freeware game, Ao Oni.
When I first played this game, I thought the enemy looked incredibly stupid and had no idea how the heck that thing was supposed to scare anyone. More so, the game is a 2D RPG Maker game so I really couldn't see this being that bad. Fortunately, I was very, very wrong.
An example of what I mean.
The game has a randomized element if you diddle daddle too long in the mansion, the monster (Ao Oni, aka Blue Demon) starts coming after you. There's also a few set pieces later into the game that are quite disturbing or spooky, though be warned the game provides quite a few jump scares. There also is many different versions of the game, which include changes in the story, mansion, scares, and the like.
It's a freeware game though, and pretty easy to find for its cult status, so something to check out for someone who wants to have a bit of an enjoyable time. Play it for a while before you judge, I know it doesn't seem very scary... At first.