Kyoto White Saikyo Miso Ozoni (New Year's Mochi Soup)

Ingredients (12)

• 4 1/2 cups dashi broth
• 4 1/2 cups water
• 1 (2-inch) sheet dried dashi kombu
• 1/2 teaspoon dashi powder
• 1 (2- to 3-inch) piece daikon radish
• 1 (3-inch) piece carrot
• 1 cup mizuna, or other mild leafy green
• 2 small taro roots (satoimo)
• 4 slices red kamaboko
• 3 to 4 tablespoons Saikyo white miso
• 4 pieces mochi rice cake
• 1/3 cup dried bonito, optional