Yakushima

Timeline

1. Approx. 15.5 million years ago

   Granite intrusion

   A massive granite body intruded into what is now central Yakushima, becoming the basement on which Kyushu's highest summit later rose.

2. Approx. 7,300 years ago

   Kikai Caldera mega-eruption

   A vast eruption at the Kikai Caldera to the south is believed to have blanketed much of Yakushima in pyroclastic flow and ash.

3. 702

   Listed under Tane Province

   The Shoku Nihongi records Yakushima within the old Tane Province, marking its first appearance in Japanese written history.

4. Late 16th century

   Timber survey for Hoko-ji

   For Toyotomi Hideyoshi's Hoko-ji Daibutsuden, Ishida Mitsunari directed Shimazu Yoshihisa to survey Yakushima's timber, and shipments are believed to have reached Osaka from Satsunan waters.

5. 17th century

   Industrial Yakusugi felling

   Satsuma's domain government began industrial-scale logging of Yakusugi, and by the Meiji era almost all prime cedars on the island had been cut down.

6. 1966

   Jomon Sugi nickname takes hold

   Staff of the former Kamiyaku Town spread word of the largest ancient Yakusugi, and the nickname Jomon Sugi gradually entered common use across Japan.

7. 1980

   Biosphere Reserve designation

   Under UNESCO's Man and the Biosphere programme, 18,958 hectares of Yakushima were designated a Biosphere Reserve.

8. 1985

   Mount Miyanoura waters selected

   Spring water from Mount Miyanoura in central Yakushima joined the Environment Agency's One Hundred Famous Waters, recognising the island's water under heavy rainfall.

9. May 1993

   Nagata-hama Ramsar listing

   Nagata-hama, ten hectares of beach hosting the largest loggerhead sea turtle nesting site in the North Pacific, was registered under the Ramsar Convention.

10. December 1993

    UNESCO Natural Heritage inscription

    Yakushima was inscribed alongside Horyu-ji, Himeji Castle and Shirakami-Sanchi in Japan's very first World Heritage cohort, and as the country's first natural site.

11. 2007

    Japan's Top 100 Geological Sites

    Yakushima's granite mountains and river landscapes were selected for Japan's Top 100 Geological Sites, prompting renewed appreciation of its geological value.

12. 2017

    Typhoon Noru hits the island

    Typhoon Noru, also numbered as Typhoon No. 18, struck Yakushima directly, with one death and other damage reported on the island.

13. November 2023

    Osprey accident in nearby waters

    A U.S. military V-22 Osprey tilt-rotor went down in waters near Yakushima, with seven crew killed and one person reported missing in the incident.

Detailed History

Human activity on Yakushima reaches back to the Jomon period, and 6th-century Chinese records in the Book of Sui describe envoys to the Liuqiu region, an area thought to take in waters around the island. The Shoku Nihongi of 702 records the island within the old Tane Province. Through Edo times the Shimazu lords of Satsuma governed it as part of Osumi Province. Yakusugi cedar yields large amounts of antimicrobial resin in response to fierce winds and rainfall, and from medieval times its durable timber was prized for building and shipbuilding. When Toyotomi Hideyoshi commissioned the Daibutsuden hall at Kyoto's Hoko-ji, Ishida Mitsunari instructed Shimazu Yoshihisa to survey Yakushima's timber, and shipments are believed to have reached Osaka from the Satsunan waters. From the 17th century the domain industrialised Yakusugi felling, and by the Meiji era almost all prime cedars had been logged out. Trees of millennium-class age, with warped grain that could not be milled on the mountain, were left standing and many still survive today. On the logged terrain, seedlings grew into beautiful secondary forests over 300-400 years; today, millennium-class giants and deformed trees are called Yakusugi, while younger second-growth trees are called Kosugi. After 1868 the island became part of Kagoshima Prefecture and its population peaked in the 1960s. In 1966 the existence of a colossal ancient Yakusugi was made widely known, and the nickname Jomon Sugi gradually took hold. In 1980 the island was designated a UNESCO Biosphere Reserve under the Man and the Biosphere programme, covering 18,958 hectares. In May 1993 Nagata-hama, a ten-hectare beach hosting the largest loggerhead sea turtle nesting site in the North Pacific, was registered under the Ramsar Convention; in December that year the island was inscribed, alongside Horyu-ji, Himeji Castle and Shirakami-Sanchi, as part of Japan's very first World Heritage cohort and the country's first natural site. Typhoon Noru hit in 2017, leaving one dead, and in November 2023 a U.S. military V-22 tilt-rotor went down in waters off the island, with seven crew killed and one reported missing.

Cultural Significance

Yakushima carries an unusual three international designations: UNESCO Biosphere Reserve in 1980, Ramsar listing of Nagata-hama in May 1993, and inscription as a UNESCO Natural World Heritage Site in December 1993. The Heritage zone covers 107.47 square kilometres, about 21 percent of the island, taking in the central range, Yakusugi old-growth forests and the western forest road area, valued as a temperate relict forest with strikingly old ecological roots. Yakushima National Park covers around 42 percent of the island, protecting the vertical gradient from coastline to summit as a single landscape. Nagata-hama, the North Pacific's largest loggerhead sea turtle nesting beach, has drawn international attention as a symbol of marine biodiversity. Yakushima is also widely cited as the visual inspiration for the forest in Hayao Miyazaki's Princess Mononoke, and its Yakusugi and moss forests have shaped Japanese views of nature across generations. The novelist Fumiko Hayashi captured the climate by saying it rains thirty-five days out of every month on Yakushima, a line that still echoes in literature and tourism.

Architectural Details

Yakushima's natural architecture rests on a granite massif climbing from sea level to the 1,935 m summit of Miyanouradake (Mount Miyanoura), draped in old-growth Yakusugi forest. The central mountains arose from an enormous granite intrusion about 15.5 million years old, and a long history of uplift and intense rainfall has carved steep slopes and candle-stub rock spires. The island is nearly circular, around 28 km across and 89 km in circumference, and ridgelines from 1,000 to 1,900 m have earned the nickname Alps on the Sea. Yakusugi (Cryptomeria japonica) is the keystone species of the temperate conifer forest above 600 m: millennium-class giants are called Yakusugi, younger second-growth trees Kosugi. Notable individuals include Jomon Sugi, the Wilson Stump, Yayoi-sugi, Daio-sugi, Meoto-sugi and Sandai-sugi. The Jomon Sugi trail runs about 22 km round-trip from the Arakawa trailhead, mixing an old tramway with mountain paths; Shiratani Unsuikyo offers a 3-5 hour loop via Taiko-iwa; and Yakusugi Land threads several routes through millennium cedars on suspension bridges. Prefectural Route 77 rings the coast, and along the Western Forest Road the World Heritage laurel forest reaches almost to the shoreline.