That particular knife, O', is a model I'm not familiar with. I was just at the C/S website looking for that knife, but I didn't see one exactly like yours so I'm thinking discontinued or even counterfeit. As-a-matter-of-fact, I was reading their detailed info on fake and/or clones, so it seems they're more of a target than I thought. They claim they're in the process of approaching Chinese websites that are selling clones and threatening legal action. Good luck with that! I didn't see a model number on yours so it's hard to tell where it came from other than the "JAPAN" etch on the tang, but then it says "Ventura, Calif." on the rear tang, so your guess is as good as mine.
There's something about that knife I can't quite put my finger on. I've never seen that style or model and I'm fairly familiar with C/S knives, I've never seen a C/S knife with a sliding stud or even a long pull, to me the lanyard hole looks almost like a DIY after thought, and the confusion about where it was made is all adding up to it being a non-C/S knife, but that's strictly my opinion.
You can always look at it as getting yourself an inexpensive folder that you can beat the crap out of daily, or of course, resell it.
If you're finding yourself becoming more interested in Japanese made knives, follow Mark/SSk's posts, since he's the closest thing to an expert on Japanese cutlery we have. I have a few myself and they definitely stand out of my collection.
