Well since Japan don’t have good higher BRs anti tank hunters as a ground attacker I think this one will be good BR IV or BR V aircraft. Its very good against armor and it has 2 x 250 kg bombs and the 57 mm cannon can crack even the biggest doom turtles The 2.7kg APHE rounds had muzzle velocity of 700m/s. a bit slower then Nudelman-Suranov NS-45 on the Yak 9K 780 m/s.
The two forward firing 20mm Ho-5 cannons should be fairly good against light ground targets and aircraft which end up in front of it. Ki-93’s biggest issue would certainly be the lacking defensive armament of only a single 12.7mm Ho-103