Sorry to be a total Anorak, but...
That image you posted is either a Ki-46-I (unlikely, as so few were made) or a Ki-46-II, since it still has the step in front of the pilot's windscreen. Here is a Ki-46-III:

And only a very few Ki-46-II were fitted with a pair of 20mm in the nose and a single 37mm firing obliquely upwards from what had been the observer's position, as a stopgap effort to counter the B-29.
Nearly all of these planes were used in the long-range strategic photo recon role, and right to end of the war, they were high-flying, fast planes that were hard for the USN and USAAF to catch.
And they're flat-out gorgeous.