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Omuro-yama hill in Ito City, Shizuoka Prefecture, is a scoria cone.

Omuro-yama, 580 meters above sea level (about 300 meters high from its foot), with the crater on top, 250 meters in diameter and 40 meter deep, was formed by a single volcanic eruption about 4,000 years ago. Although there are many scoria cones in Japan, this one is extremely rare in that this is so beautifully shaped. Hence this is designated a national monument. Incidentally, a scoria cone is made up of porous rocks originated from magma scattered from a crater. The porous rocks accumulated around a crater to form a conical hill, that is a scoria cone. Omuro-yama is always covered with short grass due to the annual burning of the entire hill in early spring. Therefore, the distant view of the beautiful cone-shaped body can be seen throughout the four seasons. Once you reach the top of the hill by taking the lift from the foot of the hill, you can walk around the promenade surrounding the crater. The second photo shows the extinct crater seen from the promenade.


Licensed tour guide, travel consultant,

Masahisa Takaki.

全国通訳案内士 高木聖久。





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