Otaguri is a traditional local dish from the Ina Valley in southern Nagano Prefecture, made by slowly simmering horse intestines until tender. Particularly popular in the cities of Ina and Iida, this distinctive regional specialty can be found not only in local homes but also at izakaya pubs and casual restaurants.
With its rich flavor and unique texture, Otaguri is especially popular as a dish to accompany sake. For visitors interested in discovering the food culture of rural Nagano, it offers a fascinating taste of the region’s long relationship with horses and traditional cuisine.
The name “Otaguri” is believed to come from the traditional process of washing the intestines, which involves pulling and gathering them by hand. Horse intestines can reach approximately 20 to 30 meters in length, making careful preparation an important part of the cooking process.
After the contents are removed, the intestines are thoroughly washed in salt water and then simmered slowly for several hours. The traditional preparation takes approximately four to five hours, allowing the intestines to become tender while developing a deep, savory flavor.
Seasonings vary from household to household. Miso, salt, and soy sauce are among the ingredients commonly used, giving each version its own character and reflecting the personal traditions of local cooks.
The Ina Valley has been known as a horse-breeding region since ancient times. Historical traditions tell of horses from the area being presented to the Yamato court, the ancient political center of Japan.
During the Edo period (1603–1868), horses also played an important role in transportation and commerce along the Sanshu Kaido, a major regional route connecting the Ina Valley with surrounding areas. Horse breeding became widespread, and people developed a culture of making full use of the animals for food as well as transportation and agriculture.
Otaguri emerged from this long relationship between the people of the Ina Valley and horses. The practice of eating horse meat and using the animal’s internal organs without waste became part of the region’s traditional food culture and has survived into the present day.
The origins of Otaguri are generally traced back to the late Meiji period. During this time, eating horse organs became increasingly established in the Ina Valley. In the Taisho period, a butcher in the Matsuo area of Iida is said to have begun selling the intestines as a simmered dish.
The dish was originally known as “horse simmered dish”, but it gradually came to be called Otaguri. Because it could be prepared and served as an affordable meat dish, it became popular among local residents and eventually developed into one of the area’s best-known traditional foods.
One interesting feature of Otaguri is the difference in seasoning from one part of the Ina Valley to another. In the Ina area, miso-based seasoning is particularly common, while in the Iida area, salt-seasoned Otaguri is more typical.
Some people may initially find the aroma of horse intestines distinctive, but carefully prepared Otaguri has little unpleasant odor. Instead, slow cooking brings out a rich and satisfying flavor.
Chopped green onions and chili peppers are often served as garnishes, adding freshness and a touch of spice. Otaguri is also considered an excellent match for Japanese sake, making it a popular choice at local drinking establishments.
Today, Otaguri can be found at restaurants throughout the Ina Valley, including local izakaya pubs and casual eateries. It is also sold as a prepared food at supermarkets in the region.
For visitors who want to take the local flavor home, Otaguri is available in vacuum-packed and frozen forms and is sometimes sold through mail-order services. This makes it a distinctive souvenir or gift for those interested in experiencing the traditional flavors of southern Nagano.
For local residents, Otaguri remains a nostalgic taste associated with home cooking and regional traditions. For travelers, meanwhile, its unusual ingredients and long history provide an intriguing introduction to a side of Japanese food culture that is rarely encountered outside the region.
Horse meat is generally known for being relatively high in protein and low in fat, and horse-meat dishes have attracted renewed attention as interest in healthier eating has grown.
Otaguri is also prepared in a variety of ways. In addition to the traditional simmered version, some households stir-fry it with garlic, mirin, and soy sauce, while others cook it together with vegetables. These variations demonstrate how the dish has continued to evolve within everyday home cooking.
Otaguri has traditionally been regarded as a nourishing dish, particularly during the cold winter months. Its hearty flavor and warming character make it a comforting part of the region’s seasonal food culture.
Otaguri is much more than a local specialty. It embodies the history of the Ina Valley, where horses played an important role in transportation, agriculture, commerce, and everyday life. The tradition of using the whole animal also reflects the practical wisdom of rural communities and their long-standing respect for valuable resources.
Still prepared in homes, restaurants, and food shops throughout the region, Otaguri remains a living part of southern Nagano’s culinary heritage. For travelers exploring Iida, Ina, and the surrounding Ina Valley, trying this distinctive dish is an opportunity to experience the area’s history and local character through food.
Whether enjoyed with a glass of sake at a traditional izakaya or purchased as a regional specialty to take home, Otaguri offers a memorable taste of the culture, history, and warmth of the Ina Valley.