that's very interesting. I never knew the Japanese had anything like this. Looking at the picture, it seemed like the planes were connected to the sub underwater.
If they were able to get to the US coast and launch these, I wonder how that would have changed the face of the war. Adds a wrinkle to the justification of nuclear attacks on Japan.
It wouldn't have done anything. 1-2 planes? You'd need 30 of these subs launching a coordinated attack to do anything of importance. Any small amount of boats or protected harbor would've been able to flak down 1-2 planes before they got close to the boat pretty easily. These were nothing more than the german equivalent of V1 or V2 weapons. Scare the populace a little bit, but have no real importance on the war outcome.
They had a special on these subs on the National Geographic channel yesterday. Yamamoto ran this program and it was his plan to have over 20 of the subs capable of carrying 3 small bombers each to put together a wave of 60 planes to attack a big name US target. When Yamamoto was killed the idea of the large scale attachk on a US mainland target was abandoned. The idea of attacking the Panama canal became the focus but that plan was not carried out.
At the end of the war Japan had 4 or 5 of these subs and also a fast attack sub. The US Navy wanted to keep that technology away from the Soviets at all costs, so they scuttled the remaining subs off Hawaii in 1946.