Tested pretty thoroughly.
Junyo in the Azanian faces ground air, and the carrier planes don't fly in a naval air battle. Not using PiF; default cariers only. There is never an option for the Junyo (disrupted or not) to fly in the Azanian sea when attacked by the Mosquito Mk. 26.
(1) Select Azanian Sea
(2) React with the Mosquito from Victoria in the Seychelles (whoops, Japan missed that guy)
(3) Set die rolls
(4) Axis rolls 2
(5) Allies roll 1
(6) Either side selects air combat
(7) Japanese planes are momentarily converted to neutrinos and don't interact with the rest of the world.
(8) The Mosquito is likely to hurt the Junyo with no fighter cover
After confirming, I also edited the save file to un-disrupt the Junyo & tested a fourth time, but I get the same result: the Junyo refuses to fly.
PS - This "push the envelope" solitaire game shows me I'm clearly less motivated at defense... It has to be psychological defending against myself, because I successfully stuffed a more experienced opponent in Barbarossa when we first bought WifFE, with the much thinner Russian defense, perfecting my hedgehog strategy very early on. In THIS, my first solitaire game, I'm absolutely terrible. Russia, China, India, Egypt... So I asked myself why don't I start over? Answer: testing tactics to see how bad bad ideas turn out, so I know when & where to push my luck! Yea, that's it... Or here it is: I'm continuing it to stress test the program to make sure it's solid!