- 1 strip dried kelp (konbu), (4 in/10 cm long), wiped with a damp cloth
- 4 cups (1 liter) water
- 4 cups (50 g) dried bonito flakes
Soak the dried kelp in a saucepan of water for 1 hour. Simmer over medium heat. Just before the water comes to a boil, remove and discard the kelp. Sprinkle the bonito flakes into the water and remove the saucepan from the heat immediately. As soon as the flakes sink, strain the stock and discard the flakes.