2026.5 I thought it was read "Maguro no Misaki," but apparently it's read "Shibi no Saki." I thought "shibi" was Ainu, but apparently it's Japanese from the Heian period. One explanation is that shishi＝宍, and because tuna looks like red animal meat (宍), it is called 宍魚. Another theory is that tuna loses its freshness easily, making it an unlucky fish＝"shibi" (死日, death day). Apparently, the cape is shaped like a tuna's back, and the columnar joints look like scales. At Genbudo in Toyooka City, Hyogo Prefecture, which I visited several years ago, the columnar-jointed rocks were reportedly cut crosswise and used as building stone because the site was near a populous area and on land. Also, it was named "Genbudo" by a Confucian scholar of the Edo shogunate in 1807, and in 1884 Dr. Koto Bunjiro of the University of Tokyo used the name "Genbudo" when assigning the Japanese name "genbugan" to basalt. Considering that it later became a national natural monument, it's very unfortunate that this larger-scale formation can only be seen from a distance offshore.

[Shibi no Saki] A cape where you can see andesite columnar joints Hokkaido Natural Monument It was given this name because the cape's rocks overlap like the scales of a tuna (鮪＝shibi). This coast consists of columnar joints of pyroxene andesite from the Tertiary period (700 ten-thousand～100 ten-thousand years ago). Around the time the Hidaka Mountains formed, lava erupted from underground and flowed vertically and horizontally, cooling and solidifying together to form unusual bundles of columns in both directions, making it geologically valuable. An irresistible place for geology lovers, but not that visually striking as scenery. A tourist destination very much for enthusiasts. Recommendation rating:★☆☆☆☆ 2022.09.03

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I found Mr. Okusa Toshifumi's review quite interesting to read. I'm uploading a photo of this cape viewed from the north The columnar joints are interesting, a different type from those at Tojinbo in Fukui

Go down the nearby stone steps right to the shoreline and approach the columnar joints—the view is incredibly impressive! It's a natural monument.

You'll pass right by if you're not careful‼️