One common problem has to do with the numbering of the pins. The american-made plug starts from the right, looking at the rear of the socket end. The japanese-made equivalent numbers them from the left.
Or maybe I'm remembering that backwards. Takeaway is that they are opposite.
Might slide back the cover of the 'other' plug that you know is correct and see how they compare.
The published diagram is for the original jap-made plug. If you wire up an american-made plug by those numbers, you get a hookup that's a mirror image of what's correct.
Haven't seen this in a long time, but I do remember you get smoke.
This radio is reaching the "awkward" age where simply plugging it in for a smoke test is a hazard. We start with a current-limited 1-Amp 12-Volt bench supply and gator-clip power to the whine choke under the chassis near the center-rear. If the transistorized part of the radio will run properly, it's time to power up the AC cord with a variac and a small-size breaker in line.
If the new capacitors get hot, this suggests that maybe the rectifiers that feed into them got damaged before the new caps were installed. If so, they could feed AC into the polarity-sensitive electrolytic caps. Might permanently damage them, might not.
Usually does.
Have a look at the primary hookup on the main power transformer. Should have the "117" taps connected. Parts of Japan use 100 Volts, and if someone moved the wires to those lugs, that would cause headaches.
73