This is the cheapest Japanese Donburi I think.

Natto
is a food made from fermented soybeans.

Kimchi
is a Korean food made from Chinese cabbage.

egg
everybody knows.

it costs only about 100 yen to eat lunch!

Lately I eat it for lunch.

…

I told you “Japanese”
although Kimchi is Korean food.
but
Kimchi is the popular food all over Japan.