Add the dried kelp to 1 liter of cold water and bring to a boil.

Diet Cold Buckwheat Noodles
A low-calorie cold buckwheat noodle recipe perfect for enjoying on a hot summer day.
What You'll Need
Instructions
Once the water boils, reduce the heat to simmer and extract the kelp broth.
Remove the kelp, turn off the heat, and add the katsuobushi.
Let the katsuobushi steep for 5 minutes, then strain through a sieve.
⏱️ 5m 0sIn a pot, combine the jin-ganjang, cooking wine, and sugar, and boil until the sugar dissolves to make the soy sauce base.
Mix the broth and the soy sauce base in a 4:1 ratio to make the tsuyu.
Chill the finished tsuyu in the refrigerator or over ice.
Boil the buckwheat noodles in a pot of water for 4 to 5 minutes.
⏱️ 5m 0sRinse the boiled buckwheat noodles in cold water and drain.
Place the buckwheat noodles in a bowl and serve with the chilled tsuyu, radish, green onion, seaweed flakes, and wasabi.