Umami

Have you heard the word Umami?
Do you know its definition?
Generally we define it “the 5th flavour other than
1) sweetness,
2) acidity,
3) saltiness,
4) bitterness”.
However, as a noun of loaded adjective Umai, its usage in Japanese is a bit complicated.
Here you can find the articles dealing with the topics of Umai and Umami.