Hiyajiru (Cold Miso Soup)

Also written: 冷や汁 · 冷汁

A local Miyazaki summer dish of chilled miso-based soup poured over rice, celebrated as a distinctive regional food tradition.

Miyazaki Kyushu-Okinawa Life & Daily

About this place

Hiyajiru, literally chilled soup, is Miyazaki's quintessential summer soul food, a distinctive regional eating culture where a cold miso-based soup is poured over rice, celebrated as a practical and flavorful solution for enduring humid, scorching summers when appetite wanes. While similar cold soups exist across Japan, Miyazaki's version has become iconic. Traditionally, farmers and warriors during the Sengoku period needed quick nourishment between labor or battles, mashing miso with grilled fish, and this evolved into a home staple in samurai residences and farmhouses. The base is made by dry-roasting small sardines or horse mackerel and sesame seeds in a pan, grinding them thoroughly in a suribachi mortar with barley miso or blended miso, spreading the paste onto aluminum foil and toasting it in a toaster oven for six to ten minutes until lightly charred, a step considered one of two pillars of authentic flavor alongside salt-massaged cucumber. The toasted miso paste is then dissolved gradually into chilled dashi stock, typically eight hundred milliliters for four servings, avoiding simple cold miso soup by creating layers of smoky aroma. Ingredients added include tofu torn by hand, thinly sliced cucumber pre-massaged with salt to concentrate flavor, myoga Japanese ginger, shiso perilla leaves, and sometimes ice cubes to keep it cold. The mixture is served over mugi-gohan, barley-blended rice, which adds nutty texture and was historically valued for stamina. Modern arrangements incorporate Miyazaki traditional vegetables like Sadohara eggplant, wood cotton tofu drained with paper towels weighted down, and ume plum paste for acidity, as demonstrated in Japan Airlines' hometown support crew recipe video featuring cabin attendants. The crew notes that in Miyazaki restaurants, hiya-jiru teishoku featuring barley rice topped with cold soup is a standard menu item evoking nostalgic hometown memories. Pro chefs such as Hirose Tomoaki of Miyazaki cuisine specialty shop Denden-den emphasize that exact ingredients are flexible, general advice includes using any blue or white-fleshed fish, any household miso though barley miso is common, and any preferred dashi, encouraging each household to find its own flavor. Techniques for precise preparation without mortar involve putting flaked grilled aji fish in a plastic bag and crushing with a spoon, dry-frying the paste without oil while stirring continuously with a wooden spatula until moisture evaporates and it forms a clump, then cooling and dissolving with cold broth using whisk or mixer. Restaurants in Miyazaki City like Furusato Ryori Suginoko and Omotenashi Yumekagu serve versions using sardines and mackerel, garnished generously with toppings. Because the dish is satisfying yet not too filling, with protein from fish and tofu, salt replenishment, and cool temperature, it remains especially perfect for summer, gaining attention as a unique food tradition where rice becomes the vehicle for chilled soup, drawing interest from international visitors seeking light, fermented, and fermented-miso umami experiences.