There is the greatest variety of filamentous fungal fermented food in Asia. KOJI, which
is filamentous fungal fermented cereal, is used widely to seed or culture various fermented food and
beverages such as miso, soy sauce, sake, and so on. KOJI is important enzyme producer, including
amylase, protease, lipase, and so on. KOJI include not only filamentous fungi but also bacteria and yeasts.
Effect of mixed culture in filamentous fungi fermentation are an improvement of fermented food nutrient
and functionality and high efficiency of material conversion. Especially, a fermented fish products are
often produced by filamentous fungi like KOJI because the use of KOJI on fish fermentation improves
fermented products. Conclusions and future prospects are discussed