Krusty,
It sounds like you are describing thje Ki-46, not the Ki-45.  The Ki-45 was designed as a fighter from the start.  The Ki-46 was a recon aircraft that latter was pressed into service as a fighter.
Odee,
There was no greater danger of fire from the wooden construction.  I have a photo of a Mossie that was covered in burning fuel from the Me410 that it shot down.  The Mossie returned home with some damage.  It was not kindling.