Sweeeeeeet.<--------- That's me masking my severe jealousy ;) Looks like it's in minty shape! I believe the half exposed images are a shutter that's just slightly out of sync with the winder. If you can fire the shutter with the back open you'll be able to see the drag, totally fixable.
I know right :D I wouldn't say it's mint but very close. Privilege of living in Tokyo is the abundance of used camera shops where you can obviously manipulate the camera a little bit before wasting your money and soul.
I tried firing the shutter with the back open at all speeds many times, especially in bulb mode, and I didn't notice anything wrong with a naked eye (I might not know what I am looking for though). Also, most of the frames are OK, so I don't know. Maybe my finger had been touching the shutter dial (which rotates when you press the shutter) and hindered its movement.
Good luck, Japan is probably the best place to have it looked at too! Can we talk for a minute? If a certain Japanese resident came across Bronica lenses, in minty shape, there is a certain US resident who would gladly pay you a finders fee plus all expenses. This might just make Japanese residents feel better about posting camera porn and making others envious :)
While the Japanese residents might not be feeling bad whatsoever for making others envious, they would certainly be glad to help and would definitely be able to keep an eye open for Bronica lenses.
You just made my day.
And if you need anything from California i.e., lottery tickets, used rims for your car, or overpriced consumable goods, you just say the word!