look on the japanese scope, there should be a small , oval shaped tag on it somewhere, that says something like 'govt. inspected'. For decades, japan was dead serious about their quality control, in particular on optics, and their stuff had to pass some mighty rigorous inspections, for them to pass. Japanese made glass, on japanese made parts, and assembled in Japan, by japanese workers. So then, if you have a toyota that still kicks ASD@#RWsss from the 1970's, and some killer old made binos, cameras, or other, then you will figure out where I am going with this; I have an old Tasco Japanese made scope, that is a 6x24, that has two windows in the eyepiece, one for rangfinding, and one for guestimating the size of your animal at certain distances. it then has replaceable turret rings at the top, from a standard zero, that you can replace and just turn to the marked distances, they are marked from 100 to 500 meters, and submarked ever 25 yards. there are 5 of these discs, starting with a 22lr disc, then slower centerfires, then standard speed centerfires, faster centerfires, and finally Weatherby mag type centerfires.
And lemme tell you; the darn things work.
So therefore, I say, stick with the Japanese older stuff, you cannot go wrong.
Even with the new glass/optics; they still are double tough, and do not farm out the parts or mfgrg of the bits. Look at Weaver scopes, they are still top notch.