If you have ever paid a little extra for a Sumo Citrus in January, you already know the basic hallabong experience: a big, topknotted mandarin with a loose peel and sweet, low-acid flesh. Sumo Citrus is a brand name for the Shiranui mandarin, which Japan calls dekopon, and Korea grows the same type of fruit under the name hallabong.
Korea has a second winter citrus that gets just as much attention at the fruit stand, and it behaves very differently in the hand. Cheonhyehyang looks smoother, peels thinner and announces itself with a scent before the first segment comes apart. The two look similar enough from a distance that Korean media regularly runs explainers on telling them apart.
This guide compares them by what you notice when you peel them, then covers how to tell them apart at a market, when to expect them, and where a reader outside Korea might realistically look. Availability abroad is the least certain part, and the guide says where the evidence runs out.
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| Same season, different peel: a knobby, thick-skinned hallabong beside a smooth, thin-skinned cheonhyehyang. |
Hallabong: The Topknot and the Loose Peel
Hallabong is the easier of the two to recognize, because it has a knob at the stem end. Korean growers named the fruit after Hallasan, the mountain at the center of Jeju Island, since the bump resembles its peak. Japan developed the underlying variety in 1972, and it reached Korea around the 1990s. Jeju now grows more than 90 percent of the country's hallabong, usually in greenhouses, according to figures cited by Korea JoongAng Daily.
Hold one and the skin is the first thing you register. It is thick and pebbled, rougher than a typical mandarin, yet it comes away easily, often in large pieces. The color is close to a navel orange, which is why a hallabong can pass for a big orange until you notice the knob and the loose peel.
Inside, the segments are tender and juicy, with few seeds if any, and sweetness is the headline. Korean fruit writers describe a high-sugar, low-acid fruit with a candy-like profile. Jeju agricultural extension materials list hallabong at roughly 13 degrees Brix, a standard measure of sugar content, with acidity of about 1.4 percent, which is low enough to keep the fruit tasting mellow.
Cheonhyehyang: The Scent Arrives First
Cheonhyehyang is Korea's name for Setoka, a Japanese tangor registered in Japan in 1998 and grown on Jeju since the 2000s. The name is written 天惠香 and is usually rendered as "scent from heaven," which tells you where the fruit puts its effort.
The peel is thin and smooth, a bright orange without the knob, and the fruit tends toward a rounded, slightly flattened shape. Japanese cultivar records describe Setoka as weighing 200 to 280 grams with a thin rind that peels easily, while Korean press coverage puts cheonhyehyang at two to three times the size of an ordinary mandarin. Break the peel and a sweet, fresh smell rises right away, which Korean fruit writers single out as its signature.
The flesh is plump and seedless. Whether it is sweeter or sharper than hallabong depends on who you ask. A Korean citrus exporters' association lists the peel as thin and the sweetness as equal to hallabong, and Japanese data for Setoka give 12 to 13 degrees Brix with acidity below 1 percent. Several English-language guides, on the other hand, describe cheonhyehyang as a little more tart. Those figures come from different studies and are not directly comparable, so treat the sourness question as open and plan to taste both yourself.
Telling Hallabong and Cheonhyehyang Apart at the Market
Shape and skin tell you almost everything, and a quick check at the stall saves you from buying the wrong one.
- A knob at the stem end and a thick, pebbled skin point to hallabong.
- Smooth, thin skin and a rounded, slightly flattened shape without a pronounced knob point to cheonhyehyang.
- Cheonhyehyang gives off more fragrance once the peel is broken.
- Either fruit should feel heavy for its size, and a noticeably light one is likely to be dry.
Both belong to what Korea calls mangamryu (만감류), the late-ripening citrus: larger, richer fruit harvested after the ordinary mandarin, which Koreans call gyul. Relatives such as redhyang (레드향) and hwanggeumhyang (황금향) sit in the same stall, so a label that only says 만감 will not tell you which one you are holding.
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| Gift boxes often mix late-season citrus, so check the knob and the skin before you buy. |
Timing is looser than most guides suggest. Greenhouse hallabong can arrive as early as December, with the first harvest of the season reported around the start of that month, while Jeju visitor guides list January through March for both fruits. Sources even disagree on which one comes first: a Korean citrus exporters' association says hallabong harvest begins in February and cheonhyehyang in March, whereas one importer's guide says cheonhyehyang tends to arrive slightly earlier. Heated greenhouses shift the calendar, so go by what is on the shelf rather than by the date.
Beyond Peeling: Salads, Jam and Desserts
Both fruits are mostly eaten fresh, but cooks do put them to work. Korean food coverage notes that hallabong's juiciness and sweet-and-sour balance suit salads, jams and desserts, and cheonhyehyang's aroma makes it a natural for citrus desserts. One importer's guide goes further and suggests squeezing cheonhyehyang into cocktails for its perfume.
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| A loose, thick peel makes hallabong an easy fruit to eat at the table. |
For a simple tasting at home, peel both and eat a segment of each before you decide how to use them. The knob and the skin will tell you which is which, and the first breath of scent will tell you which one belongs in a dessert.
Finding Them Outside Korea
This research could not confirm a reliable retail source for fresh Jeju hallabong or cheonhyehyang in North America, so everything below is a lead rather than a promise.
The closest familiar relative is Sumo Citrus, which is sold from January through April in the United States and grown in California's San Joaquin Valley. It is the same Shiranui type as hallabong, although growing conditions differ and a Korean-grown fruit may taste different. For cheonhyehyang, the Japanese name Setoka is the one to search under. Japanese produce sources list it from mid-December through March in Japan, and a Japanese grocer might carry it, though no US source was confirmed.
Korean supermarkets are the other place to look. H Mart is the largest Korean grocery chain in the United States, with stores concentrated on the East and West coasts. The Jeju provincial trade agency ran a winter 2024 to 2025 promotion at seven H Mart locations in the US that included hallabong tea, and at three Galleria supermarkets in Canada that carried Jeju mandarins. That shows Jeju products can reach shelves through these channels, but it does not show that fresh hallabong or cheonhyehyang is stocked each winter.
If a Korean grocer near you has either on the shelf this winter, buy one of each and peel them side by side. The knob, the skin and the first burst of scent cover most of what this guide describes.
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