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Shikotsu-Tōya NP., Hokkaido
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At just 1,231 m, Mount Orofure hosts alpine flowers more often seen on 2,000 m peaks. Pacific air rises against its exposed ridge, bringing cool, foggy conditions that favor a high-country garden.
The Ainu place-name Orofure-pet is commonly explained as “red water in the river.” Yet the stream from the mountain is now called Shiramizu-gawa—“White Water River”—and Japan’s Environment Ministry says the change remains unexplained.
In the 1970s–80s, a garden-plant craze made Orofure’s flowers targets: Noboribetsu’s history recounts sacks of stolen plants tossed from Rakan Rock to trucks below. Today, local climbers rope off flower patches.
Ancient hot fluids altered the rock beneath Orofure Pass into weak, clay-rich ground that repeatedly slid. The yellow-brown scar helped force a safer route: a bypass tunnel opened in 1988.
Horse chestnuts scattered on Orofure’s lower slopes may descend from a tree transplanted by residents displaced when Horobetsu Dam submerged Okukawakami. Local history suggests squirrels helped spread its seeds from a shrine.
During a 2024 patrol, an Environment Ministry ranger found deer trails and bite marks among Orofure’s Shirane-aoi. A regular hiker also noticed fewer blooms; the report suggests deer browsing may be part of the story.
At Orofure Pass, winter fog can freeze onto birch branches as rime ice. Moist ocean air rises against the range, and persistent wind leaves the trees low—so the forest looks sculpted by frost.
Since 2009, the local Sobetsu Ecomuseum Friends have led snowshoe outings around Orofure Pass to seek rime ice—a lovely winter counterpart to the mountain’s celebrated summer flowers.
