下地島

A jet on approach makes a low pass over the reef, then climbs again without landing. This is touch-and-go training at Shimojishima Airport, the rhythm by which the island marks its afternoons. The runway occupies an outsized share of the land, and almost everything else is held as public ground — limestone flats, low scrub, a coastline that drops away into sea cliffs on the western side.

Walk inland from the coast and you reach Tooriike, twin pools where the water shifts color where fresh and salt layers meet. Further on stands Obi-iwa, a single great rock thrown up by an old tsunami and still treated as a place of worship. Between these points the road is mostly empty. The bridges to Irabu — six of them, including the old Sawada-bashi — make the neighbouring island feel like an extension of the same quiet, though Irabu carries more houses, more shade, more signs of daily life.

Fewer than a hundred people live here. That number shapes everything: the absence of shops, the way Nakanoshima Beach (locals call it Kayaffa) holds only a handful of snorkelers on a given morning, the long pauses between buses. The island offers no obvious centre to attach oneself to, which is perhaps the point. One comes for the airfield's strange clarity, the limestone underfoot, and the sense of a place where the modern and the remembered sit side by side without explanation.