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Towada-Hachimantai NP, Aomori
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The rounded summit at Ogura Peninsula’s tip is a lava dome about 7,500 years old—not the product of Towada’s famous 915 eruption. A steam-driven blast came first; lava then built Ogurayama.
In 1908, travel writer Ōmachi Keigetsu asked locals what the peninsula’s towering cliff was called. It had no name, so he proposed Senjōmaku (“Thousand-Jō Curtain”), and they agreed.
Together with neighboring Nakayama Peninsula, Ogura frames Nakanoumi, a younger volcanic crater about 3 km across inside Towada’s larger caldera. Its deepest water reaches roughly 327 m.
A 1908 account says worshippers offered rice and prayed at a divination place across the water from Ogura. Local lore held that white mist rose up the mountain on festival days—a belief, not a weather record.
Keigetsu also wrote that Ogurayama was the only lakeside spot where monkeys lived, and that groups called at night when autumn nuts ripened. It’s a historical observation, not a claim about wildlife today.
