It sure as heck looks like Nautilus42's first ai jap sub, the one I used to make the first playable jap sub ! so at least now I know who made it ! now I know why the tower was named jap_sub_tower !

btw the download is of the tower only since it uses a typ IX hull.
What really interrests me is the british sub : the japs based some of their designs from those L class boats, the germans captured one in the skattegat too, so why not ?
"experimental Player drivable British Sub V5
replaces the stock type IIA"

same goes : typ II hull, new tower.
"experimental Player drivable American Sub V1
replaces the stock type 7B"
ANd are those mines ?????
he says :"COVERSION OF THE TYPE II G7E TORPEDOE TO A STATIONARY MINE V2
ONCE LAUNCHED REMAINS STATIONARY WHERE YOU LEFT IT
this now uses the naval mine model file for the mine
(not realistic coming out of a torp tube but fun) "
I think if we convert them we could then add more torpedoes in the bunker, like 42 more for the KRS plus the 14 torpedoes (56 spaces total) and load 42 mines, that would be fun ! do they sink ships in SH3 ????
very interresting though ! wonder why I didn't find this site in my web search ??