日本最近几年正在研究开发节能贮藏技术. 主要是研究利用自然能源(冷气),这种方法有利用外界冷空气和利用岩洞内积蓄的冷空气两种方式。在日本的东北、北海道等地建有很多利用秋、冬季外界冷风贮藏苹果的贮藏库,在富士山麓建有利用高原冷空气贮藏柑桔的贮藏库,这些都收到了很好的效果。利用岩洞内积蓄的冷空气贮藏水果是成本最低的方法,但是挖掘山洞建冷库却要花费大量资金,因此,可行的方法是利用现有的山洞和废隧道,经 Japan has been researching and developing energy-saving storage technologies in recent years, mainly studying the use of natural energy (cold air), which utilizes both cold outside air and cold air accumulated in caves. In Japan’s northeast, Hokkaido and other places built a lot of use of autumn and winter cold storage outside the apple store, built at the foot of Mount Fuji using plateau cold air storage citrus storage, which have received good results. The use of cold air stored in caves to store fruit is the cheapest method, but it costs a lot of money to mine caves. Therefore, it is feasible to use existing caves and waste tunnels.