Green Tea Noodles with Gochujang Dipping Sauce

Name: Green Tea Noodles with Gochujang Dipping Sauce
Ingredients: 3 dried anchovies or 3 tablespoons dried bonito flakes; 1 small piece konbu (dried kelp), wiped lightly with a dry cloth; 1 garlic clove, peeled; 3 tablespoons gochujang (Korean hot pepper paste); 2 tablespoons finely grated cucumber; 2 tablespoons finely grated daikon radish; 2 tablespoons fresh lime juice; 1 tablespoon finely grated ginger; 1 tablespoon low-sodium soy sauce; 2 teaspoons toasted sesame oil; 1 1/2 teaspoons sugar; 1 (7-ounce) package green tea soba noodles; 1/2 medium cucumber, cut into matchsticks; Thai or regular basil leaves (for serving)