Historical Note:

The M37 (officially; 57mm hoka,-chu sensha, M37 transl. 57mm gun carrier, medium tank, M37) was a medium tank, it was a redesigned M32 Kozushise medium tank with advanced multilayered armor because the armor of the M32 Kozushise medium tank wasn't sufficient enough in stopping the Japanese 75mm APHE shells, to counter this, the engineers at the Tazujikashi Army Tank Plant (TATP) got to work by replacing its turret, and adding additional layers of armor, 2 prototypes were built and one of them was sent to the Aberdeen Proving Ground for armor testing, it was named T37E1, the tank was accepted for service by WGSDF in the mid-1941 as M37, the tank was given the name "Konbanwa" which means Good Evening in English, it was armed with a 57mm M2 Cannon.

Info:

Main Gun: 57mm M2 Cannon

Coaxial MG: 30-06 M1919A4

Roof MG: M2HB Browning

Shells: 57mm M335A1 (APHE), 57mm M1526 (HE), 57mm M25 (APCR), 57mm M1 DR (Drill Shells), 57mm M354 (HEAT), 57mm M116 (APDS)