a. Narezushi
Narezushi, which is fish fermented together with rice
or another starch, has a characteristic taste that develops
from the auto-difestion of meat. Lactic and anaerobic
bacteria proliferate, and yeast is also an important
ingredient19). These act on the sugary content of the rice
to produce many organic acids and alcohol. The effect of
the organic acids is to lower the pH, controlling the
growth of putrefying bacteria. Thus, narezushi can be
preserved for long periods. KOJI is sometimes added
Narezushi making process such as like Kabura-zushi
(yellowtail sushi)20)and Izushi(fermented pressed
sushi)21). KOJI has strong capacity of glucoamylase
production, which is important enzyme for the glucose
production. Thus, organic acids and alcohol are produced
effectively. All narezushi salt fish before the starch
component is added. Narezushi is also considered as
having originated from the technique of preserving fish
by salting.