Chriscrawfordphoto
Real Men Shoot Film.
Regarding to the Japanese lenses after WWII.
To my knowledge, because Germany lost WWII, somehow they had to give up the then patents, in particular the patents in optic designs. Only after then, Japan started copying those reputable German designs like crazy, and gained their own reputation in optics.
The focus in photography shifts to Japan in the SLR or electronic era, when Japan figured that they could rely their blooming electronics to leap ahead of the traditional German mechanics. The general public also liked the idea of the "automatic" offered by electronics rather than being "manual", the photography market automatically focuses on the Japanese products.
I would subjectively sum it up as follows:
Japanese electronics are great,
German mechanics are great, and I consider optic designs and manufacturing(or whatever the right verb) to be "mechanics", hence German lenses are more superior.
Totally subjective and personal, don't flame me.
The Japanese cameras that built the postwar reputation of the Japanese camera industry had no electronics at all. The Rangefinders like the S2 and SP had no meter, and the Nikon F didn't have one at first, though meter prisms with extremely simple CdS Match needle metering came out soon after. This was in the 1950s and early 1960s. Even into the 70s cameras like the Nikon F2 and Canon F1 were mechanically impressive. It was only in the late 1970s that electronics became really important but by then the Japanese had their reputation solidly built.