Look out the window of any KTX heading south from Seoul and the mountain ridgelines are densely forested. That forest is roughly 50 years old.
In the early 1950s, most of those same ridgelines were bare. Historical photographs from that period show hillsides scoured down to exposed soil: the landscape of a country that had survived Japanese colonial timber extraction, a devastating war, and decades of its own citizens stripping hillsides for firewood. Korea reversed that within one generation through two state-run Ten-Year Forest Rehabilitation Plans that combined a critical bureaucratic reorganization, village-level mobilization, and a parallel push to get rural households off firewood entirely.
This guide explains how it happened, what it cost, and what it means for the country you are living in.
Why Korea's mountains were bare
The deforestation had multiple causes. They stacked on top of each other over more than a century.
Traditional Korean households heated themselves through underfloor heating (온돌, ondol), a radiant system that burned wood beneath stone floors. By 1950, firewood supplied roughly 90% of Korea's national primary energy. By 1955, Korea was burning an estimated 10 million cubic metres of timber and branches per year for household fuel alone, equivalent to about 17% of the country's entire standing forest stock at the time. A National Archives of Korea account states that without intervention, Korea's forests would have become completely barren within 10 years.
Japanese colonial rule from 1910 to 1945 accelerated the problem. Korean government archival records show average forest stock falling from 16.7 cubic metres per hectare in 1927 to 13.2 cubic metres per hectare by 1943, with the sharpest losses in the northern provinces. The same records note that in 1910, only about 21% of Korea's mountain land was actually forested; most of the rest was young regrowth or bare wasteland, meaning serious deforestation pressure predated the colonial period too. The Korean War (1950-1953) caused further destruction across the peninsula.
Illegal logging (도벌, dobeol) was a chronic additional drain. Between 1953 and 1963, unauthorized felling nationally ran at roughly 1.3 times the volume of authorized cutting. A single 1964 case at Jirisan removed more than 10,000 cubic metres of temple-forest timber over two years. An average of about 3,000 illegal-logging incidents per year occurred between 1967 and 1972.
Slash-and-burn farming (화전, hwajeon) covered about 125,000 hectares by 1973, worked by roughly 300,000 households.
By 1953, roughly half of Korea's forest area was degraded, and national growing stock had fallen to about 5.7 cubic metres per hectare, the worst figure recorded since Japanese-era forest statistics began in 1927.
How it was fixed
The organizational move that made everything else work
The most important thing about the reforestation campaign is not the tree-planting. It is where the Korea Forest Service was housed.
From 1967, the Korea Forest Service (산림청, Sallimcheong) operated as an independent agency under the Ministry of Agriculture. It had technical expertise but limited enforcement power. The forests continued to deteriorate.
That changed on February 23, 1973. President Park Chung-hee transferred the Korea Forest Service from the Ministry of Agriculture to the Ministry of Home Affairs (내무부, naemubu). This move put the country's entire local administrative apparatus behind forest enforcement: provincial governors, county officials, and police chiefs now bore direct responsibility for meeting reforestation targets, alongside forest officials providing technical guidance. It was an enforcement decision, not just a policy shift.
Park announced the First Ten-Year Forest Rehabilitation Plan (제1차 치산녹화 10개년계획) at a press conference on January 12, 1973. The final plan was in place by June 21, 1973. Its targets were ambitious: reforest 1 million hectares and produce roughly 2.1 billion seedlings over 10 years.
The results exceeded those targets, and well ahead of schedule. By 1978, the plan had reforested 1,080,000 hectares, 108% of its target, four years before the original 1982 finish date. The Korea Forest Service English site states that more than one million hectares of denuded forest were restored and that the 10-year project was completed four years in advance.
What Saemaul Undong did
The village-level operation ran through the Saemaul Undong (새마을운동, New Village Movement), Park's nationwide rural-development campaign. Village nurseries called 새마을양묘 (Saemaul yangmyo) produced about 34.8% of all national seedling output between 1973 and 1978. Village-level planting covered roughly 473,000 hectares, about 43 to 44% of the First Plan's total planted area.
The division of labor was clear: the government supplied seedlings and fertilizer for free, municipalities organized transport, and residents contributed land and labor. Village income from the program, including wages paid to participating households, came to a reported 12.3 billion won between 1973 and 1979. Saemaul-run erosion-control work also handled about 70.7% of all national erosion-control (사방사업, sabang-saeop) work in 1973 to 1975.
Over the First Plan's full run, a reported 16 million people from 175,000 institutions took part in tree-planting activities. Korea's forestry budget rose from 6.275 billion won in 1972 to 27.319 billion won in 1978, a more than fourfold increase.
The fuel substitution side
Tree-planting alone could not have succeeded as long as firewood remained the primary household fuel. The government ran a parallel push to move rural and urban households onto anthracite coal briquettes (연탄, yeontan), building out coal-rail infrastructure and briquette supply chains to reach rural families. By the 1980s, cooking had largely shifted to gas and heating to briquettes nationally. This removed the underlying driver of deforestation.
What was planted
Foresters leaned on fast-growing species, and the First Plan cut the list of recommended species from 42 down to 10. Black locust (아까시나무) and pitch pine (리기다소나무) were among the species village forest associations had been directed to raise since the 1950s, because they were relatively easy to grow in a nursery.
Korean forest science also contributed to the effort. Dr. Hyun Shin-gyu (현신규) bred improved pine varieties that were supplied to both Korea and the United States, and a fast-growing poplar hybrid that came to be known as Hyun poplar (현사시나무), named after him. The Hyun poplar was later exported to New Zealand.
Survival inspection
Seedling inspection was built into the plan: a 검목책임제, an inspection-responsibility system, was one of the First Plan's 31 priority measures.
The Second Plan
The First Plan's results led directly to a Second Ten-Year Forest Rehabilitation Plan (제2차 치산녹화 10개년계획) running from 1979 to 1987. Park Chung-hee was assassinated in October 1979, so the second plan ran mostly under Chun Doo-hwan. It shifted focus from erosion-control pioneer species toward commercial timber zones, establishing large-scale economic forest complexes that reached 334,000 hectares by 1986, about 83.5% of the original target. The plan's afforestation target was itself cut twice during its run, down to 997,000 hectares, 64.7% of the original goal; the eventual result of 966,000 hectares reforested reached about 97% of that reduced target. Despite missing even the reduced target, the government ended the plan a year early.
The authoritarian context
This story needs to be told plainly.
The program did not run on goodwill. Moving the Korea Forest Service into the Ministry of Home Affairs was an enforcement decision: it attached local police and administrative officials to forestry targets, not just forestry technical staff. Village-level planting quotas were compulsory and backed by the full weight of the local government hierarchy.
In the early 1960s, the government designated illegal logging one of "4 great social evils" (4대 사회악), alongside smuggling, drug trafficking, and organized crime, with an explicit policy of severe punishment for anyone caught cutting timber regardless of their status. Slash-and-burn farming households were resettled or stabilized through a government program between 1974 and 1979, affecting a reported 267,301 households.
The campaign was also explicitly political. It carried the name "Green Yushin" (푸른유신) from its March 1973 draft plan, explicitly linking forest greening to Park's Yushin constitutional system, the authoritarian governing framework in place from October 1972 to 1979. After public pushback over blanket mountain-entry restrictions, the government eased entry rules in a June 1973 revision to target only protected areas, and in that same revision renamed the plan's nationwide public-education measure away from the Green Yushin branding. The National Archives of Korea records Park as saying: "There is no change in basic plans and policies for completely greening these mountains within the next 10 years to match foreign forests."
A 2026 peer-reviewed study in Environmental Management by Park, Han, Kim, and Kim argues that Korea's strong state authority and centralized decision-making means the case is best understood as a reference to adapt rather than a template to copy directly, especially for countries with more participatory governance norms. Korean government and forestry-literature sources largely present the centralized enforcement as a success factor. The academic literature is more cautious about how transferable the model is.
This sits alongside other Park-era material: the same period that produced the economic miracle also produced the Gwangju Uprising. The 5.18 Gwangju Uprising Decoded guide covers the political suppression of that era in detail.
The impact today
The recovery is one of the clearest large-scale environmental turnarounds on modern record.
National growing stock went from roughly 5.7 cubic metres per hectare in 1953 to about 165 cubic metres per hectare by 2020. The Korea Forest Service describes this as 29 times the 1953 figure. Korea now has forest cover of about 63% of national land, roughly 6.3 million hectares, ranking fourth among OECD member countries by forest-area ratio. For comparison, the OECD average growing stock is about 131 cubic metres per hectare; Korea's is about 165.
Korean government and archival sources, including the National Archives of Korea newsletter, describe Korea as the only nation to have succeeded in forest restoration since World War II.
On April 10, 2025, UNESCO formally inscribed the Korea Reforestation Archives into the Memory of the World Register. The collection includes 9,619 government records: official gazettes, presidential decrees, administrative documents, photographs, and brochures documenting the reforestation program. UNESCO's own listing describes the archive as offering insight into policies and programs addressing climate change, soil erosion, and forest ecosystem restoration, and calls it a successful example of public-private governance in reforestation. Korea's total Memory of the World inscriptions reached 20 with this addition.
From recipient to donor
Korea co-hosted the 15th World Forestry Congress with the FAO in Seoul in May 2022, with roughly 15,000 attendees from about 160 countries. The congress adopted the Seoul Forest Declaration on forests' role in addressing climate change, biodiversity loss, land degradation, and poverty.
The Korea Forest Service runs bilateral forest-cooperation agreements with 37 countries (as of 2022) and supports forestry cooperation projects across Asia through the Asian Forest Cooperation Organization (AFoCO). The pattern mirrors the trajectory covered in the After the IMF Decoded guide: a country that once received international attention for a crisis becomes a country that exports its solutions.
Later plans and an open question
Forest planning did not stop with the two Ten-Year Plans. When the Second Plan ended in 1987, the Korea Forest Service moved back to the agriculture ministry, and the Third Basic Forest Plan was renamed from a forest-rehabilitation plan to a mountain-resource-development plan. The National Archives' own assessment is that, greening achieved, the government now pursues sustainable forest management balancing the forest's public-benefit and economic functions, crediting the recovery with gains in biodiversity and in forest water and recreation services.
The First Plan's own priority was speed. The National Archives describes it as quantitative afforestation aimed at national greening, and records that the Second Plan's biggest policy change was the move from quantitative to qualitative planting. The ecological quality story of Korea's forests continues to develop past the reforestation achievement itself.
Arbor Day and what foreign residents encounter
Arbor Day (식목일, Sikmogil) falls on April 5. Korea held its first Arbor Day ceremony on April 1, 1946; April 5 was designated the official date and a public holiday by 1949, and it served as one of the main mass-mobilization dates for planting campaigns through the reforestation era. It lost its public-holiday status from 2006, under a 2005 revision to the government's public-holiday regulation.
Tree-planting events still happen around April 5 each year, organized by local governments, schools, and community groups. If you encounter a tree-planting volunteer event at your child's school or your local community center in early April, that is the origin. The forests around you are the product of the campaign those events descend from.
Frequently asked questions
Is it true Korea reforested its mountains under Park Chung-hee?
Yes. The First Ten-Year Forest Rehabilitation Plan launched in 1973 under Park and was completed by 1978, four years ahead of schedule. The Second Plan ran from 1979 to 1987, mostly under Chun Doo-hwan. The methods were state-directed and coercive in places, but the outcome, a near-complete reversal of national deforestation within about 25 years, is documented in Korean government archives and peer-reviewed research.
Why were Korea's mountains bare in the first place?
Several causes overlapped. Japanese colonial rule from 1910 to 1945 removed large volumes of timber. The Korean War (1950-1953) caused further destruction. The biggest ongoing driver was firewood demand for ondol floor heating: by 1950 firewood supplied roughly 90% of Korea's national primary energy. Illegal logging ran at about 1.3 times the volume of legal cutting between 1953 and 1963. Slash-and-burn farming covered about 125,000 hectares by 1973. By 1953, roughly half of Korea's forest area was degraded, and national growing stock had collapsed to about 5.7 cubic metres per hectare.
How did the shift from firewood to coal briquettes help?
It removed the root cause. As long as rural and urban households depended on firewood to heat ondol (온돌) floors, any trees planted would be stripped again. The government pushed coal briquettes (연탄, yeontan) as a replacement fuel and built out coal-rail infrastructure to supply them at scale. Urban substitution was essentially complete by 1970, when only about 7% of urban households still relied on forest fuel; through the 1980s, cooking shifted to gas nationally while heating stayed on briquettes, ending the incentive to cut trees for fuel. Fuel substitution and tree-planting worked together; neither alone would have been enough.
What was Saemaul Undong's role?
Saemaul Undong (새마을운동, New Village Movement) ran the village-level side of the campaign. Village nurseries produced about 34.8% of all national seedling output between 1973 and 1978. Village-level planting (새마을조림) covered about 473,000 hectares, roughly 44% of the First Plan's total area. The government supplied seedlings and fertilizer for free; municipalities organized transport; residents contributed labor. Village income from the program came to a reported 12.3 billion won between 1973 and 1979.
How authoritarian were the methods?
Explicitly coercive in places. Moving the Korea Forest Service into the Ministry of Home Affairs gave provincial governors and police chiefs direct enforcement power over planting targets. Illegal logging was designated one of the "4 great social evils" with stated severe punishment regardless of the offender's status. Village quotas were compulsory. The campaign carried the name "Green Yushin" (푸른유신) from its March 1973 draft, explicitly tying forest greening to Park's authoritarian Yushin constitutional system (1972-1979). A 2026 peer-reviewed study in Environmental Management notes that Korea's centralized-authority model is best understood as a reference to adapt, not a universal template, precisely because many countries operate under more participatory governance norms.
What does Korea's forest look like today?
National growing stock went from roughly 5.7 cubic metres per hectare in 1953 to about 165 cubic metres per hectare by 2020, 29 times the 1953 figure according to the Korea Forest Service. Forest cover stands at about 63% of national land, roughly 6.3 million hectares, ranking fourth among OECD members by forest-area ratio. Korean government and archival sources describe Korea as the only nation to have succeeded in forest restoration since World War II.
Is Arbor Day (식목일) still a thing?
Yes, though it changed. Arbor Day (식목일, Sikmogil) falls on April 5. Korea held its first Arbor Day ceremony on April 1, 1946, and April 5 was designated the official date and a public holiday by 1949. It was a full public holiday through most of the reforestation era, and it lost that status from 2006. Tree-planting events and volunteer campaigns still take place around April 5, organized by local governments, schools, and community groups across Korea.
Why is this story relevant to understanding Korea today?
The reforestation effort sits alongside the economic miracle and the democratization movement as one of the defining large-scale achievements of the Park-era developmental state. It shows the same pattern visible in the chaebol story and the post-IMF recovery arc: a centralized, state-directed mobilization campaign producing measurable results quickly, at the cost of individual autonomy, with consequences that outlasted the political system that created them. The forests visible from any KTX window are the physical legacy of that state capacity. Korea's current position as a forestry-aid donor to developing countries is its diplomatic legacy.