As with the Type 11, it continued to use the same 6.5x50mm Arisaka cartridges as the Type 38 rifle infantry rifle, although the more powerful 7.7x58mm Arisaka round had already been adopted and was starting to enter into service with front line combat units.
Al igual que la Tipo 11, continuaba empleando el mismo cartucho que el fusil Tipo 38 (6,5 x 50 Arisaka), aunque el más potente 7,70 x 58 Arisaka ya había sido adoptado y empezaba a servir en el frente con unidades de primera línea.