Yuzu Ponzu (Japanese Yuzu-Flavored Dipping Sauce)

Bahan-bahan (1 porsi)

• 1 piece kombu (dried kelp) ((1 x 1.5 inches, 2.5 x 4 cm))
• ½ cup katsuobushi (dried bonito flakes)
• 2 Tbsp mirin
• ½ cup soy sauce
• ½ cup freshly squeezed yuzu juice