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Amami Guntō NP, Kagoshima
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Hyakunodai is a coral reef raised to 203m: this highest Kikai terrace is thought to be about 100,000 years old. Across that span, the island rose roughly 200m—an average of about 2mm a year.
Kikai is Japan’s largest sesame-producing area, and harvest brings its “Sesame Streets”: cut plants stand by roadsides to dry in the sun. The terraced fields around Hyakunodai are part of this working landscape.
Locally, 百之台 is pronounced “Hyanudee.” Kagoshima Prefecture links hyanu to anji, a chief’s title; a Kikai history also preserves the tradition that the island’s anji met on this lookout.
On Kikai, rain disappears into porous coral limestone instead of forming big rivers. More than 50 springs emerge, often at terrace edges, and those freshwater spots helped shape where villages took root.
Hyakunodai shelters hime-tatsunami-sō, a wildflower found nowhere but Kikai. Its brief usual bloom is white or pale lilac in March–April, though scattered flowers have also been recorded in December and January.
Hyakunodai’s steep approach has a name: Shichiju-nanamagarī, or “Seventy-Seven Bends.” This old path served farm work, town errands and school commutes; today, it is part of the Amami Trail.
