Bring the water to a boil in a large saucepan. Add the kelp and anchovies, and return to a boil. Reduce the heat to medium-low and simmer uncovered for 15–20 minutes. Remove from the heat and strain. Reserve the clear stock, discard the kelp and anchovies.
Bring the stock to a boil over high heat. Add the soybean and red chili pastes and stir until they dissolv