The most well-known representatives
of the alkaline fermented foods are soybean-based (i.e.,
chongkukjang, kinema, natto, and thua nao). It should be noted,
however, that other plant seeds (nonsoybean products) can also be
used, e.g., ugba and iru of Western Africa are made from oil bean
(Pentaclethra macrophylla) and locust bean (Parkia biglobosa),
respectively