The four years it took for subjugation in the Ishiyama War was never too long when we consider that a forcible attack could not be carried out because the enemy owned many guns, that stratagems were ineffective on the army of Hongan-ji Temple, and that the enemy could carry army provisions into Hongan-ji Temple from the sea, which could not be blockaded.
石山合戦の際に討伐に4年もかかった件については相手に鉄砲が多く力攻めが無理であり調略のきかない本願寺勢であること、海上封鎖ができず海から本願寺に兵糧を運びこめたことを考えれば致し方ないといえる。