On IJAAF anti-shipping: yeah Ki-43-II does carry 2 big bombs, but they are fighters so you need fighter air unit to use them. And the IIa still doesnt have armor or durability. Outside of massed kamikaze use I think you will find better quality-price ratio in just using Ki-49s or the later dive-bomber versions of the Ki-48, and you dont need to use a valuable fighter unit for the role.
I'm torn on the issue myself, and I've not decided what I'm doing in my game.
Does the lower cost of the Oscar (1 engine) make it better for anti-ship ops than the Lily dive-bomber (2 engines)?
You can pay for two engines to drop 4x100kg bombs, or one engine to drop 2x250kg bombs.
I suppose it comes down to how many losses you're willing to accept. The IJA doesn't get a decent anti-ship platform till the Peggy, so you need to find a stopgap. The question is what's best: Oscar's strafing or Lily's dive-bombing?














