The Otsu-Gata Sensha is the Japanese modified version of the Renault tanks they purchased from France in the 1920s. Ten were purchased and they saw action battling Soviet forces in Manchuria in 1932.
Notable Modifications:
Swapping out the main armament from the Japanese 37mm Type 11 Sogekiho Infantry Gun.
Swapping to a 75hp Mitsubishi engine to improve top speed.
( a few were modified to use a machine gun instead)
In honesty this tank would be pretty bad, if the tank is deemed too bad for BR1 maybe it could be part of a rider class rework.
Any tank is still a tank and thus a threat in the right time and right place, I wouldn’t add anything stronger than a 20mm auto cannon to rider class, that would just increase HE spam.
I just checked, it has a coaxial MG in the turret which already makes it better than Ha-Go.