It's not so much the nippon I dislike, it is the aborted attempt at facsimile. They didn't do to bad a job copying the later lever guns, but the single shot, I've heard, is Val Browning's idea of improvement. The newer models are supposed to be better than the M-78, but... don't ever take it apart!
I've a gunsmithing school chum that has worked at Browning all these years and he agrees on the notion of disassembly; don't.