An additive for boiled rice that is used to avoid the lowering of efficiency at boiling for boiled rice or the like and to obtain a boiled rice of high quality presenting soft texture which is free from drying and sogginess resulting from moisture transfer during the storage thereof. There is provided an oil-in-water emulsification composition comprising a water soluble polysaccharide derived from soybean. High effect can be realized by the use of a water soluble soybean polysaccharide with a certain level or more of emulsifying capacity, and striking effect can be realized by the use of an emulsification composition comprising this polysaccharide with high emulsifying capacity combined with a polysaccharide having a certain level of viscosity even if its emulsifying capacity is poor.