Korean Gim by Region: A Map of Korea’s Laver Coasts

Talking about Korean gim by region means talking about seven stretches of coast the state has singled out on paper — a name on a register, a heritage listing, a promotion zone. None of those documents is a taste award. What they give, with dates attached, is a record of which waters Korea has decided to name.

Table of Contents

1. Where Does Korean Gim Come From?
2. Why the Water Changes from County to County
3. How Wando’s Pole-Grown Gim Became National Heritage
4. Seven Coasts That Carry a National Designation
5. What Korea Is Building Around These Coasts Now
6. Frequently Asked Questions
7. Where Your Gim Actually Grew

Where Does Korean Gim Come From?

Korean gim grows along Korea’s southwestern and western coasts, not across the whole country. Korean gim by region comes down to a short list of counties and the documents behind them. Gim (김) is the edible laver seaweed Korea farms in the sea; a separate guide covers what gim is and the names its types carry, and this one is about the water it came out of.

Korea counts that harvest as mulgim (물김) — wet laver, the crop as it comes out of the sea. South Jeolla Province accounted for 77.4% of Korea’s wet laver production in 2022, according to the national gim industry plan. The rest is spread thin: North Jeolla 6.5%, South Chungcheong 6.2%, Gyeonggi 4.2% and Busan 3.1%. The plan puts the national total for that year at 550,231 metric tons, drawing on Statistics Korea’s fishery production survey, and laver’s licensed area at some 635 square kilometers — more than any other farmed species.

Seven Korean counties hold at least one national designation tied to gim.

Why the Water Changes from County to County

The clearest evidence that Korean laver is a regional product is the government’s own paperwork. Each autumn the fisheries authorities forecast when farmers can begin chaemyo (채묘) — seeding, the work of fixing laver spores onto the nets — and in 2024 they issued that forecast county by county, because the sea cools to working temperature at different times.

Laver seeding can begin once the sea temperature falls to 22°C or below, and in the National Institute of Fisheries Science’s seeding-season forecast for 2024 the projected dates spread across three weeks.

Projected start of laver seeding, 2024 forecast

Laver seeding window (2024 forecast)	Areas	Note
Late September (around Sept 22)	Taean, in South Chungcheong	Earliest window
Early October (Oct 1–8)	Seocheon, Gunsan, Busan, and the counties of Jindo, Sinan, Haenam and Wando	Most designated gim coasts share this window
Mid-October (Oct 9–14)	Mokpo and Goheung	Latest window

Most designated gim counties fall inside the same early-October window, so what separates them is days rather than seasons. And a forecast is not a rule: the institute builds it from five years of temperature records with provincial research bodies, and the 2025 edition came out by province rather than county.

January and February are when management decides quality, the institute says, and farmers are told to keep stocking density appropriate so that water keeps moving through the nets and delivering nutrients. What those minerals do once gim reaches the plate is a separate story.

Some of that supply washes in from the land: the same 2024 forecast warned that Seocheon (Daecheon) had received only 76% of normal rainfall, raising the risk of weak growth. The head of the institute’s Seaweed Research Center put the case plainly in March 2025 — farming conditions and methods differ from region to region, which is why the center breeds cultivars for particular places. The anchovy-and-kelp broth draws two of its ingredients from these same waters.

How Wando’s Pole-Grown Gim Became National Heritage

Wando’s pole-grown gim farming was designated Korea’s National Important Fisheries Heritage No. 5 in December 2017. The Ministry of Oceans and Fisheries’ 2017 heritage designation notice, issued December 4, describes what was listed: a method, not a brand.

Jijusik (지주식) — pole farming — means driving poles into the tidal flat and stringing nets between them. Because the flat drains at low tide, the ministry notes, the nets get more sunlight than in buryusik (부류식) — raft farming, where nets hang beneath floats and stay underwater. The notice records the trade-off: pole-grown gim is said to have superior flavor, aroma and color, though the method takes more time and labor than floating rafts.

The practice descends from seop yangsik (섶 양식) — an older way of gathering seaweed grown on bamboo stakes set in tidal flats and shallow water, centered on Gogeum Island in Wando. The Wando Haetae Fishery Cooperative — haetae (해태) is an older word for laver — was founded in 1922 to organize it. When the designation was made in 2017, 24 households in three Wando villages — Cheongyong-ri, Gagyo-ri and Bongmyeong-ri — were still farming this way.

What is specific to Wando here is the designation, not the method: the listing records its pole farming as heritage without claiming that the practice has vanished from other coasts.

Korea’s earliest recorded laver farming is placed at Taein Island (태인도) in Gwangyang rather than Wando. The method is thought to have been devised there between 1640 and 1659, at a site that is now a provincial monument.

Wando Laver was entered on the geographical-indication register as No. 8 in August 2010, more than a year after Wando abalone and Wando kelp (dashima) were registered on February 25, 2009.

Seven Coasts That Carry a National Designation

Two government systems put a county’s name on a gim record, and they do different jobs. The first is geographical indication. Korea’s fishery geographical-indication register lists five laver names: Wando Laver, Jangheung Laver, Haenam Gim, Goheung Laver and Muan Dolgim. They are five of the 25 seafood entries on the National Fishery Products Quality Management Service’s geographical-indication register, which opened in February 2009 with Boseong-Beolgyo cockles, its first seafood item. Korea runs two protection systems side by side — collective marks under trademark law, and this register under the agricultural and fishery products quality act — so absence from one does not mean a name is unprotected.

The second system is industrial. Under the Gim Industry Act, the Ministry of Oceans and Fisheries designates gim industry promotion zones (김산업진흥구역) and funds them at 5 billion won per site. Three counties were chosen in the first round, on March 9, 2023: Seocheon, Sinan and Haenam. Jindo and Jangheung followed on March 21, 2024, bringing the total to five. A county has to satisfy all three conditions for a gim industry promotion zone: it must show that combining its gim businesses would help the industry grow; its gim facilities must not be geographically separated; and it must clear a scale test — any one of 1,000 hectares of farmable area, five dried-laver plants or 800 metric tons of annual capacity. A gim industry promotion zone is an industrial designation, not a quality grade.

Seven counties with a national laver designation (as of 2026)

County	Province	National laver designation (number and year)	What the record shows
Wando (완도)	South Jeolla Province	Geographical indication No. 8 (2010); Fisheries Heritage No. 5 (2017)	Registered laver name; pole farming listed as heritage
Jangheung (장흥)	South Jeolla Province	Geographical indication No. 10 (2011); promotion zone, second round (2024)	Registered laver name; a county ordinance defines musan (acid-free) gim
Haenam (해남)	South Jeolla Province	Geographical indication No. 18 (2014); promotion zone, first round (2023)	Registered laver name plus a first-round industrial zone
Goheung (고흥)	South Jeolla Province	Geographical indication No. 21 (2015)	Registered laver name; no promotion zone
Sinan (신안)	South Jeolla Province	Promotion zone, first round (2023)	Industrial zone; no laver name on the register
Jindo (진도)	South Jeolla Province	Promotion zone, second round (2024)	Industrial zone; one of eleven wet laver auction sites
Seocheon (서천)	South Chungcheong Province	Promotion zone, first round (2023)	Industrial zone; no laver name on the register

A national gim designation is a record of paperwork, not a complete map of where Korea farms laver: seven counties carry one, one more registered laver name belongs to a county outside them, and Gunsan and Busan farm laver without holding any designation at all.

Jangheung County: What the Registered Name Says

Jangheung Laver entered the register as No. 10 on January 18, 2011, and the revealing detail is who holds it: the Jangheung Musan Gim Producers’ Association. Musan (무산, 無酸) — acid-free — is a word the county has written into local law. Jangheung County Ordinance No. 2540, in force since July 19, 2021, defines musan gim as gim farmed without acid and produced inside the county. No national statute or ministry notice uses the term, and no public certifier for it turned up in the records checked.

The treatments the word refers to are lawful and regulated. A ministry notice defines an activated treatment agent as a substance based on organic acids, acidic electrolyzed water, nutrients or a high-salinity solution, used to clear competing algae, control disease and encourage growth. Counties must check a product’s composition against that standard before it goes onto the farms.

Haenam County: A First-Round Promotion Zone

Haenam Gim was registered as No. 18 on February 21, 2014, held by an association whose name opens with Ttangkkeut (땅끝) — land’s end. Nine years later the county was named in the first round of promotion zones. In the 2024 forecast it sat in the early-October window with most of the other designated coasts — a reminder that the paperwork separates these counties more sharply than the water does.

Goheung County: The Latest Seeding Window

In the 2024 forecast Goheung and Mokpo shared the country’s latest seeding window, October 9 to 14 — the opposite end of that forecast from Taean’s September 22. Goheung’s own register entry is older: Goheung Laver was registered as No. 21 on May 18, 2015, held by the county’s dried-laver fishery cooperative corporation. The Goheung tidal flat joined the UNESCO World Heritage site "Getbol, Korean Tidal Flats" in the extension inscribed on July 25, 2026. The Getbol inscription recognizes the mudflat ecosystem; it certifies nothing grown in the water above.

Sinan County: Farming Among the Tidal Flats

Sinan farms among the tidal flats that carry its name abroad. It holds no laver name on the register, but it took a place in the first round of promotion zones in March 2023. The flats were inscribed as World Heritage in 2021, and the county’s salt fields hold National Important Fisheries Heritage No. 4, designated in 2016, where sun-dried sea salt comes off the same ground.

The county is also popularly associated with gopchang gim (곱창김) — one of the named laver types Korean shoppers ask for — though that link rests on trade reporting rather than any designation, and the same laver is harvested all along the southwestern coast. Where gopchang gim sits among the five named types is a question for another guide.

Jindo County: Auctions and a Second-Round Zone

Jindo Island was designated a gim industry promotion zone on March 21, 2024, in the second round with Jangheung — the pair that brought the national total to five. The island is also one of eleven areas where wipanjang (위판장) — wholesale auction markets — handle wet laver as it comes off the boats, which is where the crop first gets its price. The kitchens ashore work from the same water — a Jindo Island restaurant cooking the local catch is one of them.

Seocheon County: The West Coast Entry

Seocheon sits on the Yellow Sea in South Chungcheong rather than on the southern coast, and it was named in the first round of promotion zones in March 2023. Its tidal flats were inscribed as World Heritage in 2021 alongside Sinan’s. An international dried-laver exchange opened in the county on January 22, 2024 — the Seocheon International Dried Laver Exchange (서천 국제 마른김 거래소), as its operator calls it. The announcement describes an opening attended by about 30 buyers from eight countries, and puts the total project cost at 445 million won.

What Korea Is Building Around These Coasts Now

Everything above stops at the waterline. What happens after the harvest, from wet laver to a dried sheet, belongs to another article — and it is the part of the industry the government is rebuilding.

The processing map does not match the farming map. Of Korea’s 384 dried-laver plants, 309 are in South Jeolla; of the 279 seasoned-laver plants, 119 are in South Chungcheong, ahead of South Jeolla (54) and Gyeonggi (48). Mareun gim (마른김) and jomi gim (조미김) — plain dried sheets and the seasoned kind — are largely made in different provinces.

The 2023 industry plan set a schedule for a separate, nationwide gim exchange, to be introduced in 2025 and running from 2026 through fisheries cooperatives and producer groups. Korea is still building a national grading scheme for dried laver, with criteria set by variety in 2024 and a quality standard table from 2025. The plan’s separate quality-evaluation criteria include the non-use of inorganic acid, and inside the promotion zones a record-keeping system for treatment-agent use is being built.

For a sense of scale: Korea produced 540,000 metric tons of bangsamunui gim (방사무늬김) — the laver species most dried sheets are made from — in 2020, ahead of China at 440,000 and Japan at 290,000. Seaweed is a daily food in Korea, and where seaweed sits in the wider Korean diet is a subject of its own.

Frequently Asked Questions

Where is most Korean gim grown?

South Jeolla Province accounted for 77.4% of Korea’s wet laver production in 2022, according to the government’s gim industry plan, which draws its figures from Statistics Korea’s fishery production survey. Six of the seven designated counties sit in South Jeolla; Seocheon is in South Chungcheong.

Which Korean laver names are registered geographical indications?

Five: Wando Laver (No. 8, 2010), Jangheung Laver (No. 10, 2011), Haenam Gim (No. 18, 2014), Goheung Laver (No. 21, 2015) and Muan Dolgim (무안돌김, No. 28, 2024). They sit on the fishery geographical-indication register kept by the National Fishery Products Quality Management Service, which uses these English names.

When is Korean gim harvested?

Seeding — chaemyo (채묘), fixing laver spores onto the nets — happens from mid to late September, once the sea drops to 22°C or below, though the 2024 forecast pushed most designated coasts into early October. The ministry’s plan puts farming and harvest between November and the following May, with January and February the peak months.

Is pole-grown gim better than raft-grown gim?

The Ministry of Oceans and Fisheries notes that pole-grown laver is said to have superior flavor, aroma and color, though the method takes more time and labor than floating rafts. The reason it gives is sunlight: the poles stand on tidal flats that drain at low tide, so the nets spend part of each day in the open air.

Do these seven counties cover every place Korea farms gim?

No. These are the coasts that hold a national designation, not a complete map of production. Gunsan and Busan both appear in the government’s seeding forecast and among the eleven areas that run wet laver auction markets, and the geographical-indication register itself carries a laver name from outside this group.

Where Your Gim Actually Grew

These seven designated gim counties are not ranked. A geographical indication records a name and who may use it; a fisheries-heritage listing records a method judged worth keeping; a promotion zone records where public money goes. Read together they map where Korea has decided its laver comes from, and leave out the coasts that grow it without any paperwork at all.

If you want the ingredient rather than the map, start with Korean laver as an ingredient, then the ways Koreans actually eat gim — or go straight to beef gimbap, where most of a sheet’s life ends. Korea applies the same place-name logic across its pantry: Yeongyang’s chili powder and Mungyeong’s omija berries make the same argument with different crops.

Next time a package tells you where its laver grew, you will know what that county name is doing there — and what it is not claiming. Share this guide with anyone who buys gim by the box.