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Fuji-Hakone-Izu NP, Tokyo
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On Fugahama’s 100 m reef-monitoring line, coral cover fell from 68.8% in 2023 to 1.9% in June 2026 after the 2024 marine heatwave. The formerly dominant table corals had almost vanished.
Fugahama’s archaeological site yielded a 7th-century Sue-ware long-necked bottle shard and an 8th-century Nara-sancai small-jar fragment. Both finds are held by Miyakejima Local History Museum.
Fugahama’s eruptions shaped the underwater landscape too: large volcanic arches and tunnels lie beneath the coast, creating a far more intricate seascape than a simple reef.
In the same Ako district as Fugahama, Toga Shrine launches a mikoshi procession every other August. Over 6 days, the portable shrine visits shrines in Miyakejima’s other 4 districts, then returns home.
Fugahama’s reef has been monitored since 1998 with a standardized 100 m underwater survey line. The census paused during Miyakejima’s 2000 evacuation and resumed after 2005, with island divers and scientists helping track change.
The village road to Fugahama has no utility poles or guardrails. At the shore, waves have cut into the coast, exposing layers formed during Miyakejima’s repeated volcanic eruptions.
