After a very long time, I decided to work on a what-if "Nipponki '46" subject.
The idea is of an IJAAF heavy bomber with sufficient payload and range in a fantastic scenario where Imperial Japan is at war with USSR over Siberia.
Taking the Heinkel He111 Zwilling idea a step further I'm thinking that the merging of two Mitsubishi Ki-67s, properly modified with a pressure cabin for the crew, would be enough to meet the Army demands.
The next step was the elimination of the fuselage side blisters that would be inappropriate on a plane with a pressure cabin.
Stay tuned on this posting for updates.