Sefuri-san Mountain — Hidden Beech Forest Summit

Sefurisan (1,077m), on the border between Saga and Fukuoka prefectures, is the highest peak in northern Kyushu and carries a summit beech (buna) forest unlike anything accessible from Fukuoka City — old-growth trees with massive root structures extending over the trail surface, a canopy so dense the trail feels like a tunnel. The mountain is virtually unknown outside the hiking community and offers complete solitude on weekdays.