Senba-jiru (Salted Mackerel and Daikon Clear Soup)
The mackerel's head and backbone go into the stock along with the fillets, and the clear broth still tastes strongly of fish. Pouring boiling water over the pieces and dunking them straight into cold water to pull off blood and scales is what keeps that broth clear. Each bowl gets a few drops of ginger juice, yuzu peel and two kinds of slivered onion.