Izushi is based on the fermentation of fresh fish, rice, and vegetables by Lactobacillus spp. ; katsuobushi results from the fermentation of tuna by as pergillus glaucus.

• Izushi是用新鲜的鱼肉,大米和蔬菜通过乳酸杆菌发酵而制得来。katsuobushi是由淡蓝色曲霉发酵金枪鱼而制得的。