So you want a plane that was built after the Japanese learned about LW "heavy fighter" Bf110s, designed in 1937, first flown in 1939, and didn't undergo much improvement until late 1941 where they met and were wiped from the skies by P-40s.....?
Many were built. Few were really used. The fighter variants that met P-40s several times in 1942 in group encounters simply proved the plane was no suitable for combat. They were repeatedly destroyed.
They were put into "home defense" which -- yes -- did include chasing B-29s... However the actual "combat" was lacking as the plane could neither climb to nor catch the B-29s.
Their last claim to fame in a terrible combat career was as kamikaze attacks on US warships nearing the Japanese islands.
-10,000 for inclusion into this game. Not very necessary.
EDIT: Just so you know... The Ki-45 had a FTH of less than 10,000 feet, at which it only reached 330mph (above 10k that would drop significantly) and a ceiling of 32k which was wholly inadequate to chase down B-29s cruising at 350mph and 32k