You had the Ka-Mi with 2 20mm’s in the rear, 25mm’s were not utilized on any Japanese vehicle. The Type-96 likely did not utilize a 75mm as Wikipedia claimed although not much info and a person who was at one time Perhaps trustable was somewhat found out to not necessarily be as trustable although I won’t go into that rabbit hole of the old past, just something interesting to mention.
Aside from that Ta-Ha is a possibility although that’s a whole other rabbit hole since there is very little info existing. So it could possibly have had 2 German 37mm’s or simply 1 Japanese 20mm. Who really knows?
In the turret, you’re correct about that although that’s divulging from the question and more or less not related to if the Japanese 25mm’s were used as an mobile SPAA platform for the IJA.