I'm not sure how much of a spoiler it is to say that you beat the final boss in a game. It was never something I'd really given much thought before reading this piece by Dan Whitehead, but on reflection it seems kind of obvious.
What makes this less clear, in Okami's case, is that you beat Orochi - up until that point the Source of All Evil - about a third of the way through.
I remember being surprised, the first time I played the game, that there was more to do after beating him. I can only assume it took me longer to reach this point on that playthrough than it did this time around - my clock is currently sitting at about 12 hours. And I've been doing a lot more exploring and treasure-hunting than I remember bothering with before.
I'm hoping that this speedier run-through is going to hold up, as it will hopefully take away some of the feeling of slog in the back end. I've been trying to remember the order in which things happen, and in a couple of places I'm unsure if I'm thinking of Okami or Dragon Quest VIII, which I played around the same time on PS2 (but never got around to finishing).