New Summer Orange, known in Miyazaki as Hyuganatsu, is one of the prefecture’s signature citrus fruits. It is also called Konatsu in some regions of Japan. Recognized by its bright yellow skin, fluffy white pith, and pleasantly refreshing acidity, this distinctive citrus fruit offers a flavor and eating experience quite different from those of ordinary oranges and mandarins.
Hyuganatsu has long been enjoyed by local residents and visitors alike. Its refreshing aroma, juicy flesh, and mildly sweet, tangy taste make it especially popular during spring and early summer. One of its most unusual characteristics is that the soft white layer beneath the yellow peel is intentionally eaten together with the fruit.
For travelers visiting Miyazaki, Hyuganatsu is a local specialty worth discovering, whether enjoyed fresh, incorporated into desserts, or purchased as a regional souvenir.
Hyuganatsu is generally slightly larger than an ordinary Japanese Satsuma mandarin. It has a smooth, bright yellow exterior and a relatively thick peel that protects its juicy flesh.
Its most distinctive feature is the soft, fluffy white pith located immediately beneath the yellow outer skin. Unlike the white pith of many other citrus fruits, which is often removed because of its bitterness, the white layer of Hyuganatsu is mild and pleasant to eat.
Eating the fruit together with this white pith creates a particularly enjoyable balance. The refreshing acidity of the juicy flesh is softened by the gentle texture and mild flavor of the pith, producing a delicate combination of flavors that distinguishes Hyuganatsu from other citrus varieties.
Hyuganatsu is usually prepared in a way that preserves its characteristic white pith. Rather than peeling it completely like an ordinary mandarin, the yellow outer skin is removed thinly, in a similar manner to peeling an apple.
The white pith is left attached to the flesh, and the fruit is then cut into convenient pieces. This allows the juicy fruit and soft white layer to be enjoyed together.
Hyuganatsu can be eaten as it is, offering a refreshing citrus flavor with a pleasantly sharp acidity. Its light and clean taste makes it an excellent choice as a snack or dessert, particularly during warmer weather.
For those who prefer a sweeter flavor, a little sugar or honey can be added. The sweetness balances the natural acidity of the fruit and creates a simple dessert-like treat.
Chilling Hyuganatsu thoroughly in the refrigerator before serving makes it especially refreshing. On a hot summer day, its cool, juicy flesh and fragrant citrus aroma offer a pleasant way to enjoy a seasonal Japanese fruit.
The main season for Hyuganatsu is from April through June. Its flavor develops gradually during this period, and the balance between acidity and sweetness changes as the season progresses.
Hyuganatsu harvested around April tends to have a stronger acidity. Its fresh fragrance and crisp, sharp flavor are particularly appealing to people who enjoy citrus fruits with a refreshing tang.
From May through June, the acidity gradually becomes milder, allowing the natural sweetness to balance more harmoniously with the tangy flavor.
As the season advances, the soft white pith and juicy flesh become particularly enjoyable. The combination of a pleasantly fluffy texture and abundant juice makes this period especially suitable for appreciating the fruit at its best.
Because the taste changes throughout the harvest season, trying Hyuganatsu at different times can provide slightly different experiences of the same fruit.
The origins of Hyuganatsu date back to 1820, when a naturally grown citrus tree was discovered by chance in the garden of a man named Magata Yasutaro, who lived in what is now Miyazaki City.
The fruit initially attracted limited attention because its acidity was relatively strong. However, its distinctive flavor gradually came to be appreciated, and cultivation spread from the late Edo period into the Meiji period.
Unlike citrus varieties developed through deliberate breeding programs, Hyuganatsu is believed to have originated from this naturally occurring seedling. Its accidental discovery eventually led to the establishment of one of Miyazaki’s most recognizable agricultural specialties.
The name Hyuganatsu was given to the fruit by Tamura Toshichika (1856–1934), an educator originally from Miyazaki Prefecture.
In 1887, he recognized the fruit’s distinctive qualities and named it Hyuga Natsumikan. Hyuga is the historical name associated with the region that is now Miyazaki Prefecture, while Natsumikan refers to a type of summer citrus fruit.
Tamura sent cuttings and young trees to his family home. From there, cultivation gradually spread throughout the surrounding region, helping establish Hyuganatsu as a local agricultural product.
The fruit’s scientific name is Citrus tamurana Hort. Tanaka. It was named by Tanaka Chozaburo, a distinguished authority on citrus research, in recognition of Tamura’s contribution to the fruit’s history.
The scientific name preserves an important part of the story of how this distinctive citrus variety was discovered, recognized, and developed into a regional specialty.
Miyazaki Prefecture remains the principal region associated with Hyuganatsu, but the fruit is also cultivated in several other parts of Japan.
Other producing areas include Kochi, Ehime, Kumamoto, the Izu Peninsula in Shizuoka Prefecture, and western Kanagawa Prefecture.
Outside Miyazaki, the fruit is frequently marketed under names such as Konatsu, Tosa Konatsu, and New Summer Orange. Although the commercial names differ according to the region, these fruits are closely associated with the same distinctive citrus tradition.
An important development in modern Hyuganatsu cultivation was the introduction of seedless varieties.
Beginning in 1992, the Kihara Fruit Growers Association in Miyazaki Prefecture worked on developing seedless Hyuganatsu through greenhouse cultivation, with guidance from the Faculty of Agriculture at the University of Miyazaki.
The project resulted in a variety containing very few seeds, making the fruit easier and more convenient to eat.
Seedless Hyuganatsu has become particularly popular as a gift and travel souvenir. Its convenient preparation, refreshing flavor, and distinctive appearance make it an attractive product for both individual consumption and gift-giving.
Miyazaki and Kochi are the two principal production regions for Hyuganatsu in Japan.
According to the original article, Japan’s total Hyuganatsu harvest in 2010 amounted to 5,714 metric tons. Miyazaki Prefecture accounted for approximately 55 percent of the national total, while Kochi Prefecture represented approximately 28 percent.
These figures illustrate the importance of Miyazaki as a major production center for this distinctive citrus fruit.
Within Miyazaki Prefecture, tourist farms have also increased, particularly in the southern part of the prefecture and in the plains. Some farms offer visitors the opportunity to harvest the fruit themselves, providing a hands-on way to experience local agriculture.
Hyuganatsu is known for its refreshing acidity and contains nutrients commonly associated with citrus fruits, including vitamin C and citric acid.
Vitamin C is an essential nutrient that contributes to normal immune function and collagen formation. Citric acid is one of the compounds responsible for the fruit’s characteristic tangy flavor.
The original article also highlights the traditional association of these nutrients with refreshing foods and recovery from fatigue. As with other fruits, Hyuganatsu can be enjoyed as part of a balanced diet.
The soft white pith is another notable feature of Hyuganatsu. It contains dietary fiber, which contributes to normal digestive function.
Unlike many citrus fruits, in which the white layer is usually discarded, Hyuganatsu is traditionally eaten with the pith still attached. This means that the fruit’s characteristic texture is not merely a culinary feature but also a way of making use of more of the whole fruit.
The combination of juicy flesh and fiber-rich white pith is one of the reasons Hyuganatsu has a distinctive place among Japanese citrus varieties.
Although fresh Hyuganatsu is particularly popular, its juice, peel, and fragrant citrus flavor can be used in a variety of foods and drinks.
The juice can be used to make refreshing beverages and citrus-based dressings. Its acidity and aroma work particularly well in light dishes, adding a clean citrus note without overpowering other ingredients.
The yellow outer peel can be processed into marmalade or candied citrus peel. These products make use of the fruit’s fragrant skin and provide a way to enjoy its distinctive aroma beyond the fresh-fruit season.
Hyuganatsu can also be incorporated into salads and sweet-and-sour pickled dishes. Its refreshing acidity helps balance richer ingredients and adds a bright flavor to vegetable-based preparations.
The fruit’s versatility extends to more unexpected dishes. The original article notes that Hyuganatsu is sometimes used as an ingredient in sushi rolls and even in gyoza dumpling fillings.
Its citrus aroma and acidity can add freshness to savory dishes, demonstrating how a regional fruit can become part of a wider local food culture.
Hyuganatsu can also be steeped to make fruit liqueur. This preparation captures the fragrance of the citrus and produces a light, refreshing alcoholic drink with a distinctive aroma.
Spring and early summer are the best seasons to discover fresh Hyuganatsu in Miyazaki. During the harvest season, the fruit is available at local produce markets, roadside stations, and direct-sales outlets throughout the prefecture.
These locations offer an opportunity to find freshly harvested fruit and discover products made by local farmers and food producers.
Some farms offer seasonal harvesting experiences and tasting events. Visitors can pick Hyuganatsu themselves and enjoy the fruit immediately after harvesting.
Such experiences provide an opportunity to learn more about citrus cultivation and the agricultural traditions of Miyazaki. They are particularly enjoyable for travelers who wish to experience local food culture beyond restaurants and souvenir shops.
Hyuganatsu is also popular as a souvenir from Miyazaki. In addition to fresh fruit, a variety of processed products are available, including:
These products allow visitors to take home the distinctive taste of Miyazaki and enjoy it even after their trip has ended.
Hyuganatsu is also celebrated through seasonal food events in Miyazaki Prefecture.
During the early spring season, events such as Hyuganatsu fairs and citrus festivals are held in the prefecture. Local restaurants and food businesses take part by offering original dishes, desserts, and other specialties made with the fruit.
These events bring together local agriculture, regional food culture, and tourism. They provide visitors with an opportunity to discover creative ways of using Hyuganatsu while enjoying the seasonal atmosphere of Miyazaki.
Event names, dates, and participating businesses may vary from year to year, so visitors interested in attending should check local announcements during their trip.
New Summer Orange, or Hyuganatsu, is one of Miyazaki Prefecture’s most distinctive agricultural specialties. Its bright yellow peel, pleasantly acidic flesh, and unusually soft white pith create a combination of flavors and textures that is difficult to find in other citrus fruits.
The fruit also has an interesting history, beginning with an accidental discovery in 1820 and developing into a regional specialty through the efforts of local growers and educators. Modern cultivation, including the development of seedless varieties, has made Hyuganatsu even more accessible to consumers.
Whether eaten fresh with its white pith, enjoyed in a dessert, used in local cuisine, or purchased as a souvenir, Hyuganatsu offers a refreshing taste of Miyazaki’s agricultural culture.
Travelers visiting the prefecture during the spring and early summer harvest season should take the opportunity to try this distinctive citrus fruit and discover why it has remained one of Miyazaki’s most beloved specialties.