Very long, very awesome, very beautiful.
The OST is awesome and it combines with every scene in the game. The voice acting in japanese makes the game even more immerse. The japanese OP fully and completely combines and sinchronizes with the Jpop star Ayumi Hamasaki' music "Startin' ".
The gameplay, hopefully, it's different from the Resident Evil-gameplay. It's very good and helps you at most part of the game.
Sometimes the camera is frustating because there are place that you can't move it. The only thing missing in this game is the fact that they didn't make it for 2-players. It would be great if so.
If you are searching for a game with japanese acting, japanese enviroment, lots of monster to kill, lots of weapon to choose and a bunch of heroes to choose. Then, Onimusha: Dawn of Dreams is your game.
All-in-all it is a must-have-game!