Which types of Japanese food do you like?
food is generally uncountable but it can become countable when you describe different types of food
A popular Japanese food is miso.

It is the food which fermented soybean or rice.

It is the food when soybeans or rice is fermented. / It is the food produced by fermenting soybeans or rice.

We can use the various things like ramen and udon.

We can use it in various things like ramen and udon.

It is said that the miso came from China.

Now it is exported to the world.

The most exported country is the United States.

I want to write about soy sauce tomorrow.

Hope this helps!