Let someone pass the best configuration to run Onimusha taking the specific configuration of my processor is an AMD Phenom 2 x3 2.8, 4gb and Geforce 9600 GT. The game is playable but 100%?
I've finished 1 and 2 (NTSC-J) with the spec very similar to yours. I can only say the main story is 100% playable because I haven't really tried out those mini games, and problems might occur in there.