Have you ever played one ? This is real crap, sorry but these Japanese plywood basses are not good instruments at all, just like the Morris and other atrocities made in the seventies.
It's not because it's old that it's good.
I'm almost 52 and started on these basses that were awful but affordable when you are a student. Thanks to them, I now have a powerful left hand (and fingers) and can play double bass easily. So for that point I should say they were good, but the action was so high, the pickups so bad and noisy and the weight so heavy that telling these basses are good is proving that you never played one.
When I bought my first real bass something like 5 years later, a second hand 1972 Fender P-Bass, I asked myself how could I have been able to play such an "instrument"...