In short: Hannam Tea Estate is a black and green tea producer in Seogwipo-si, South Korea, operated by Osullocfam.Co.Ltd and certified by the Ethical Tea Partnership.
Hannam Tea Estate is a tea production facility located in Seogwipo-si on Jeju Island, Republic of Korea, at an elevation of 185 metres. The estate is operated by Osullocfam.Co.Ltd and produces both black and green teas. Records of specific commercial buyers have not been published.
Terroir & Climate
At 185 metres above sea level and situated at approximately 33°N latitude, Hannam occupies a low-elevation site in one of Korea's southernmost tea-growing zones. Estates at this altitude and latitude in Jeju typically experience a maritime-moderated climate, with milder winters and high humidity that can extend the growing season relative to Korea's mainland regions. The island's volcanic soils and coastal proximity generally favour steady vegetative growth, though such sites can also be exposed to seasonal typhoons and sea winds.
Low elevations in this latitude range tend to produce leaf with relatively bold character and lower astringency than high-grown counterparts. The combination of moderate warmth and ample moisture is often associated with quicker leaf maturity and a growing cycle that may support multiple flushes, though the cooler winters at this latitude still impose a winter dormancy absent in tropical origins. These conditions typically suit both green-tea processing, which benefits from fresh, tender shoots, and the fuller oxidation required for black tea.
Tea Produced
Hannam produces both green and black teas. Korean green teas from Jeju estates at comparable elevations are typically characterised by a rounded, vegetal sweetness with less grassiness than Japanese styles, often displaying a subtle nuttiness and smooth body. When processed as black tea, leaf from this terroir tends to yield a malty, approachable cup with moderate tannin and a clean finish, though the style remains less common in a market historically dominated by green tea production. Both categories generally reflect the maritime influence and volcanic minerality associated with Jeju Island terroir.
Operator
Hannam Tea Estate is operated by Osullocfam.Co.Ltd, a company with interests in Korean tea production and retail. Osullocfam.Co.Ltd does not operate other estates currently recorded in this directory.
Certifications & Ethics
Hannam holds certification from the Ethical Tea Partnership, an organisation that conducts independent assurance of labour and environmental standards across tea supply chains. Membership requires estates to meet benchmarks on wages, working conditions, health and safety, and responsible agrochemical use, with progress monitored through regular audits. For buyers, ETP certification offers third-party verification of ethical sourcing practices; for workers, it is intended to ensure adherence to core labour protections and grievance mechanisms.
Location & Neighbouring Estates
Hannam Tea Estate lies at 33.3165, 126.6810 in Seogwipo-si, Korea Republic Of. Its 185 m elevation is the highest of 2 estates we map in Korea Republic Of. The nearest estates in the TeaTrade directory, measured point-to-point from these coordinates, are:
- Hadong Tea Factory — 338 km away · Ulju-gun
- Ocha No Kajihara — 382 km away · Kumamoto
- Tokkoen Co. Ltd. — 413 km away · Kagoshima-City
- Atelier Sueyoshi Seicha Llc — 447 km away · Soo-Shi
- Wakohen Inc. — 456 km away · Shibushi-Shi
Observed Climate at Hannam Tea Estate (2025)
ERA5 reanalysis data modelled for Hannam Tea Estate’s coordinates recorded 2,142 mm of precipitation across calendar year 2025. The wettest month was May (401 mm) and the driest was December (14 mm). Daytime highs averaged 18.6 °C and overnight lows 12.5 °C over the year; August was the warmest month and February the coolest.
| Metric | 2025 value |
|---|---|
| Annual precipitation | 2,142 mm |
| Wettest month | May (401 mm) |
| Driest month | December (14 mm) |
| Mean daily high | 18.6 °C |
| Mean overnight low | 12.5 °C |
Frequently Asked Questions
Where is Hannam Tea Estate located?
Hannam Tea Estate is in Seogwipo-si, Korea Republic Of, at coordinates 33.3165, 126.6810, at an elevation of about 185 metres.
Who operates Hannam Tea Estate?
Hannam Tea Estate is operated by Osullocfam.Co.Ltd, according to public supply-chain records.
What type of tea does Hannam Tea Estate produce?
Hannam Tea Estate is recorded as producing black and green tea.
What certifications does Hannam Tea Estate hold?
Hannam Tea Estate is recorded as holding the following certification(s): Ethical Tea Partnership.
How much rain does Hannam Tea Estate receive?
ERA5 reanalysis data for the estate's coordinates recorded 2,142 mm of precipitation in 2025, peaking in May (401 mm).
Data sources: public supply-chain disclosures (Ethical Tea Partnership member lists, Rainforest Alliance certificate holders and retailer supplier disclosures); climate figures are ERA5 reanalysis modelled for the estate’s coordinates via Open-Meteo (calendar year 2025); coordinates and elevations from geocoded records. Spotted an error? Email [email protected].
