Miso soup is a traditional soup from what country?

I've tried miso soup before and I watched a video of Stove Boi cooking it.

Tom, two ingredients? Looks like you have 4 or 5 ingredients listed.

jsh, Dashi is made from kelp, kombu, and katsuo, bonito, a mackerel tuna， flakes. These are the main two ingredients.

jsh, I'd like to know too

What is the dashi stock made from?