So in the US the Japanese version of Final Fantasy 4 is 2 and the Japanese version of Final Fantasy 6 is 3, both released on the SNES.
It's just that Final Fantasy 2, 3 & 5 in Japan were never released in the US. As you might expect, they share similar technical problems. Final Fantasy V got the same treatment, used the same engine, and was also released on Steam a few months back. The Final Fantasy VI PC re-release is a direct port of an earlier iOS version.
