From the website:
The forces of the Imperial Japanese are further reinforced by the addition of this new resin Ke-Nu light tank.
With the Type 97 Chi-Ha medium tanks undergoing up-armament and therefore a new turret, older Chi-Ha turrets were surplus to requirements. A use was found for them by marrying them to the hulls of the Type 95 Ha-Go light tank, giving birth to the Ke-Nu. Approximately 100 of this hybrid light tank were produced.