An interesting thing about the Japanese military during WWII was its inability to cooperate. The IJN and the IJA were so full of pride that they refused to share weapon systems of any kind. From the start to the end of the war, the Navy flew their precious Zero fighter, while the Army flew their Ki-43 and Ki-61 fighters.
This rivalry got to the point that the Army commissioned two submarines, and the Navy began to produce tanks. This is the Type 89 Go-Otsu medium tank, proudly bearing an anchor on her hull.