Shells for 5.7cm tank gun are actually not quite the same as shells for Ho-401. The cartridge is the same type, but the projectiles of Ho-401 are shorter and lighter. Considering this is an autoloaded gun, I don't think it is necessarily as simple as tank 5.7cm rounds can load in Ho-401.
We have specs for only the HE shell of Ho-401 as far as I know, apart from this, there is a specific HE substitute shell (for training) AP shell (likely APHE), and a shell called 'Ho-401 Kou' in Japanese books (which IMO, could be a typing error for 'Ma-401 Kou')