Blue Cave / Hachinohe-ana was added to Your Favorites!
Sanriku Fukkō NP, Iwate
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Legend says a fisherman sent his dog into Hachinohe-ana, and it turned up in Hachinohe years later—giving the cave its name. The real sea-carved passage is only about 8 m long.
The cave’s blue is a light show, not a permanent glow: clear water catches sunlight, especially on sunny mornings, while weather and seasons shift its hue. At its brightest, the water can look cobalt or emerald.
Tucked behind the harbor seawall, Hachinohe-ana is hidden from shore and has a narrow entrance. The boat that fits is a sappa-bune, a small rocky-shore skiff local fishers use for sea urchins and abalone.
Local lore says anyone who manages to enter Hachinohe-ana may have a wish come true. Boats head into the sea cave only when conditions allow, so the sea still gets the final say.
