I'm not particularly familiar with the Emily, My impression of it is as a large 4 engine flying boat reminiscent of a Grumman. As I recall it was the workhorse of the Japanese ? ARMY or NAVY ? not sure ... I seem to recall there was a SKY TRAIN version used exclusively for resupply that could carry over 50 troops ? I reckon it would be a MUCH larger target than a catalina ... THAT the appeal ?
No, the appeal is that it could do 290mph, had an initial climb rate of over 1500ft/min, had armor for each crew position, armor for the engines and a completely protected fuel system, was armed with five 20mm Type 99 Model 1 cannons and a variable number of 7.7mm machine guns, could carry eight 250kg bombs or two 1600kg bombs or two torpedoes and had a 24 hour fuel endurance.
While it would be a larger target than any aircraft in AH other than the B-29, it would also be far, far more survivable than the PBY-5.