the ki-84 on paper was a great plane, but it had one huge flaw: its corner velocity was substantially lower than every other plane, to the tune of 30+ mph! armed with this knowledge, a properly managed plane could actually out-turn the ki-84 in the short term. while it would certainly be useful defensively against one plane if you're willing to stall-fight, but against a 'gangbang' i'd want any other fast plane out there.
-black hammer