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Fuji-Hakone-Izu NP, Shizuoka
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On July 13, 1989, a new volcano erupted beneath the sea off Ito. Surveyors saw water columns reach 113 m; newborn Teishi Knoll is 450 m wide, with its top still 81 m underwater.
Futo’s Edo-era mullet hunt could turn the sea red: lookout huts tracked the schools, then relayed catch-size signals by flags and conch-shell calls so fishers around the village could mobilize together.
Futo mullet were prized enough to be shipped to Edo by fast coastal boats. A fisheries-history account says a special flag identifying the catch let them pass Uraga checkpoint without inspection.
Bora-naya was once a seasonal fishing base, not a restaurant: during spring and autumn mullet runs, fishers lived there to store boats, mend nets and cook. Locals later restored the thatched hut as an eatery.
Futo’s 150-year-old set-net fishery uses Jogasaki’s steep seabed: its nets sit just 800 m offshore, and the local company reports more than 150 fish species entering them in a year.
At Igaigane, the coast’s jagged lava is clinker: a brittle crust on an earlier flow was shoved and shattered by hotter lava behind it, leaving sharp fragments across a deceptively flat platform.
At Oyodo-Koyodo, cooling lava shrank into bundled-looking columns around tide pools. These little pools are breeding grounds for the frog-faced jawfish, according to the local geopark guide.
Near Kadowaki Lighthouse, hime-yuzuriha trees form a near-pure coastal grove averaging 16 m tall. Ito designated the stand a municipal natural monument in 1967; look for their red leaf stalks.
A local idea to promote Jogasaki’s walking route became the song “Jogasaki Blues.” Its monument is shaped like a suspension bridge and carries lyricist Tetsuro Hoshino’s handwritten lettering.
At the southern coast’s Sasami Light Platform, Renchakuji’s priest built an oil-lit beacon around 1916; its lamp guided passing ships nightly. Today, stone foundations and a 1922 memorial remain.
Local tradition links Nichirenzaki to the monk Nichiren’s exile: it says he was left on Manaitaiwa, the offshore “cutting-board rock.” Nearby Renchakuji grew from a hall built to honor the episode.
A gun-battery site near Maekado recalls the Black Ship era: local guides say 4 guns were installed here in late Edo to guard the coast, then later moved to Shimoda.
