It was apparent that so great deal of ammunition would be required that the production for 6000 rounds of ammunition per day would be a drop in the bucket when full-fledged mobilization from the garrisons throughout Japan to Kyushu would start, then, a new plant of ammunition annexed with a lead furnace for bullets and a percussion cap factory was constructed in order to increase the production.
また各鎮台から九州への本格的な動員が開始されると膨大な量の弾薬が必要となり、6,000発/日程度の生産数では焼け石に水の効果しかない事が明らかだったため、更なる増産が図られて弾丸用の鉛溶解炉や雷管製造所を併設した新工場が建設された。