Welcome to a great forum Klundern. You've definitely come to the right place. Any advice you need, and even parts, can be found through this helpful forum.
I've been restoring some of these old MIJ kits for a couple of years now, and have learned a great deal by going back and searching the older threads, and often posing questions on new threads.
In my opinion, what you seem to have there, could be a Hoshino kit. This is a third Japanese manufacturer, not as renowned as Pearl, or Star, but definitely a contender in the stencil kit game. Still lots of grey area in the vintage MIJ debate, and I believe that there was possibly some kind of merger with Pearl and Hoshino at some point, but I digress.
Hoshino is commonly identified by it's unique 'shark tooth' lugs. These were slot style lugs, (no springs)usually found on thicker shells without re-rings. Yours are not these. Pearl, and Star both made 'Slingerland' style lugs for their stencil kits, with identifiable differences, and I have also seen one or two variations, perhaps for upper scale marketed kits. I can't say definitively by these lugs, but the bass drum t-rods appear to be Hoshino. Thinking perhaps, that it might be an earlier Hoshino kit before they went to the more recognizable, thicker shells with the sharktooth lugs. I may be wrong, but it is my guess.
One of the main attractions to collecting these old Japanese kits, is the variety of cool, original wraps. If you have a kit, (as you do) without the original wrap, there is really no collectibility value. You can make them sound pretty good with some work, (lots of tips here at VDF) but it won't amount to anything more than a player kit in the end, at best. That being said; *DON'T START DROPPING SERIOUS $ IN RESTORATION*. Don't get caught up in trying to find matching lugs for example, though, if you are to find them, VDF is a great place to start. In fact I might even have some to spare. Money aside, it can be great fun restoring an old set of drums, and learning what makes them work. Have fun with them, and take inventory of what you need, and post it here. You may get off pretty cheap, which would be optimum I would think. Good luck.