Well because its BR will be so low you wont be able to use her to grind out “Use Heavy Tank” but it should be added as she is important to the history of Japanese Armor. +1
Sadly even for her most likely BR Type 91 is gonna be Heavy in name only outside of size. But there is the benefit of crew you got people power on your side you can lose a few and keep on going so not to bad to say the least.