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Aso-Kuju NP, Oita
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Tiny lingonberry shrubs on Mount Kuju and neighboring peaks form Japan’s southernmost natural population. This rare plant community was designated a National Natural Monument in 1962.
The 1995 eruption associated with Kuju did not burst from Mount Kuju’s summit: it began on neighboring Hossho-yama’s eastern flank. Ash from the volcanic complex reached Kumamoto.
At 1,787 m, Mount Kuju is not Kyushu’s highest summit, even though it is the range’s namesake peak. Nearby Nakadake edges it at 1,791 m—a difference of just 4 m.
Each autumn, a beef festival brings the Kuju range’s southern trailhead to life: visitors grill Taketa-produced Bungo beef on shichirin charcoal braziers, with the peaks nearby.
Long before hiking was recreation, water-filled Miike crater lake near Nakadake was a focus of mountain worship. Historical records describe Kuju as a sacred high-mountain water source and mention 16 temple lodgings.
The open grassland at Kuju’s southern foot is not untouched wilderness: centuries of grazing and controlled burns have kept it from becoming forest. The seasonal burn scent is one of Japan’s “100 Fragrant Landscapes.”
In Japanese, 久住山 and 九重連山 are both read “Kuju,” but the characters signal different scales: 久住山 names this individual peak, while 九重連山 refers to the broader volcanic range.
Mount Kuju’s summit area preserves traces of 3 old craters. The Ministry of the Environment’s Kyushu Nature Trail guide describes the peak as a dome-shaped volcano of hornblende andesite.
For decades, the Kuju mountain-opening ceremony was held on the first Sunday in June. Taketa moved it to April in 2024 to ease crowding during the Miyamakirishima flower season; the event reached its 73rd edition in 2026.
