大分県 · Kyushu Region
Oita Hidden Gems
2 spots
Oita· Taketa
Oka Castle Ruins — Castleless Castle in the Sky
Oka Castle (岡城) was built on a 100-meter-tall volcanic plateau in 1594, defended by sheer cliffs on three sides and acce…
castle ruinscloud seastone walls+2
Updated Jun 2026
Oita· Taketa
Nagayu Onsen — Carbonated Hot Spring Soak
Nagayu Onsen (長湯温泉) in Taketa City is one of Japan's few naturally carbonated hot springs (炭酸泉, tansan-sen). The water c…
Nagayucarbonated onsentansan+2
Updated Jun 2026