Abstract: The research history on food irradiation in Japan was reviewed and most of the recent last reseach achievements were introduced in this paper.Especially,studies achievements on identification methods of irradiated food,evaluatio of induced radioactivity in irradiated food,the flavor changes in irradiated food and mutagenesis of irradiated food in Japan were presented.

Key words: Irradiated food , Japan , Identification method , Radioactivety