It is said that miso soup, as a food consummed at the front, was more like 'rice poured soup' and was often cooked by pouring hot water on rice and miso, but later it has changed gradually into a combination of rice and miso soup.
陣中食としての味噌汁は、むしろご飯に味噌をかけて湯を入れたものであることも多く、元々「汁かけ飯」だったものが、後にご飯と味噌汁の組み合わせに変化していったとも言われる。