Ingredients for 4 Servings

• 8 cups water, plus 2 tablespoons water
• 2 (6-inch) pieces kombu
• 1 1/2 ounces dried, shaved bonito (about 3 cups, packed)
• 1 pound chicken bones and wings (roughly chop the ribcage, if using)
• 12 cups water, plus more for boiling the bones