Thanks for the link.
One of reasons the Ki-84 was regarded competitive vs. P-51 and P-47 was the speed of the Japanese fighter. Americans clocked more than 420 mph on the Ki-84.
If the Japanese pilot flying the Ki-84 plays to the strengths of a light opponent - engage in a turning fight - he is bound to loose that fight. Opening the throttles on the Ki-84 is a way forward, just like it was the case with Hellcat or Lighting battling the Zero, in order to disengage and then engage with help of the superior speed.*
A Ki-100 can't catch any Allied fighter aware of it that is faster than Spitfire V, or the Mosquito. Ki-84 stands good chances there.
What I'm reading are the praises for the Ki-84, with remarks on lack of durability due to not having primed surfaces, along with imperfections one can only expect on a late-war Japanese fighter.
Ki-100 was IMO a good job of making a lemonade when the lemons were handed. Too bad the Japanese didn't install the Ha 109 on the 'not Ki-61' already in 1941.
* German pilot was doing that with Bf 109E-7 in Japan, angering the Japanese to no end. At the end, that experience saved the Ki-44 project, the only Japanese Army fighter that was able to emulate the 'boom and zoom' tactics the 109 was well suited for.
