Nitsuke Fish Simmered With Sake, Soy Sauce, And Sugar

Ingredients

• 1 1/2 cup dashi, kombu dashi, or water
• 1/2 cup sake (japanese rice wine)
• 1/2 cup mirin (sweet rice wine)
• 1/4 cup plus 2 tablespoons japanese soy sauce
• 1 tablespoon granulated sugar
• 4 1/4-inch-thick coins peeled ginger
• 4 4-ounce skin-on fillets fatty white-fleshed fish, such as spanish mackerel, redfish, chilean sea bass, or black cod
• 1/4 pound drained medium- firm tofu, cut into 4 equal pieces