It has been assumed that the benefit of the azekura-style was that it helped in the preservation of articles by maintaining a stable interior environment because, when the humidity is high, the wood swells and prevents moisture from entering the warehouse.
校倉の利点として、湿度の高い時には木材が膨張して外部の湿気が入るのを防ぎ、倉庫内の環境を一定に保ち、物の保存に役立ったという説があった。