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箱根町, Kanagawa
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The Izu Peninsula began as volcanoes farther south, traveled north on the Philippine Sea Plate and eventually collided with Honshu.
Mount Fuji has more than 70 flank volcanoes, revealing a much more complex volcanic system beneath its famously symmetrical silhouette.
Fuji-ko pilgrims used lakes, springs and waterfalls for ritual purification and even made pilgrimages around eight lakes at Fuji's base.
Owakudani's famous eggs turn black while cooking in volcanic hot-spring water, making the volcano itself part of a local food tradition.
Hokusai's nineteenth-century images of Mount Fuji helped make its form famous worldwide and profoundly influenced Western art.
Fuji's last major eruption occurred in 1707, opening three Hoei craters and creating a vast volcanic-ash landscape on its eastern side.
Around 3,000 years ago, part of Hakone's Mount Kamiyama collapsed, damming the Hayakawa River and helping create today's Lake Ashinoko.
Aokigahara forest developed over lava from Fuji's great ninth-century Jogan eruption, creating a forest whose foundation is young volcanic rock.
Fugaku Wind Cave remains around 3°C even in summer and was historically used to store silkworm eggs and seeds in its natural cold.
Around 100 Indo-Pacific bottlenose dolphins inhabit waters around Mikurajima, where regulated encounters allow visitors to swim near them.
Jogasaki's roughly 9 km coastline began as lava entering the Pacific and is still being reshaped by waves and marine erosion.
Basaltic Oshima, Toshima, Miyakejima, Mikurajima and Hachijojima contrast with rhyolitic Niijima, Shikinejima and Kozushima.
The different magma chemistry of the Izu Islands helps create dark basalt landscapes on some islands and striking white volcanic terrain on others.
Sengokuhara's famous susuki grassland is maintained by annual burning because, without management, trees would gradually reclaim the grassland.
Fuji's lava created caves and even lava tree molds, formed when flowing lava surrounded trees and left hollow impressions after the wood disappeared.
Fuji-ko founder Hasegawa Kakugyo is traditionally associated with ascetic practice in Hitoana Cave, helping turn volcanic features into sacred sites.
The Izu Peninsula's collision with Honshu is geologically ongoing as the Philippine Sea Plate continues pushing the peninsula northward.
Traditional Amagi wasabi cultivation uses abundant clean water flowing continuously through carefully constructed stone growing beds.
Mount Mihara's 1986 eruption left lava and scoria that remain visible across Izu Oshima, where vegetation is gradually recolonizing the volcanic terrain.
Hachijojima is essentially two volcanoes joined into one island, creating its distinctive shape and contrasting volcanic landscapes.
Kozushima's Mount Tenjo rises only 574 m, yet its broad summit contains white volcanic desert, wetlands and crater depressions.
The Fuji thistle is Japan's largest thistle, and its edible roots have traditionally been preserved in miso around the Fuji region.
Fuji-Hakone-Izu began in 1936 as Fuji-Hakone National Park; Izu Peninsula joined in 1955 and the Izu Islands in 1964.
Hakone's old Tokaido crossed difficult volcanic mountain terrain, where travelers stopped for food and rest on the journey between Edo and Kyoto.
Fuji-Hakone-Izu spans four prefectures and 121,755 ha of land, from Japan's highest mountain to active volcanic islands in the Pacific.
Fujiyoshida once had around ninety oshi pilgrim houses; some historic buildings survive today.
Oshi hosts arranged meals, lodging and prayers for Fuji-ko pilgrims before their Mount Fuji ascent.
The Former Togawa family oshi house dates to seventeen sixty-eight and is part of Fuji’s World Heritage site.
Some traditional oshi houses still welcome overnight guests in Fujiyoshida.
Fuji-ko pilgrims washed their hands and feet before entering some oshi lodging houses to pray.
Yosegi-zaiku artisans use contrasting natural wood colors to make Hakone’s intricate geometric marquetry.
Hachijojima’s kihachijo silk is traditionally woven in yellow, brown and black tones from local dyes.
The former Togawa pilgrim house in Fujiyoshida reopened to visitors in April twenty twenty-six.
Before refrigeration, ice from Narusawa Ice Cave beneath Mount Fuji was reportedly sent to the Tokugawa shogun in Edo, now Tokyo.
