Was designed as a replacement for the Type 1 Chi-He. The Type 3 Chi-Nu used the same chassis as the Type 1 Chi-He.
Initially a 75 mm Type 95 field artillery gun was used, but due to the short life of its barrel the Type 90, with a lower muzzle velocity was developed.
The turret was modified to accept a 75 mm Type 3 tank gun.
The gun was based on the French Schneider 75 mm field gun.