Keya no Oto Cave
Open by month
Partly closed in January: some days or parts are closed — see the official site.
Partly closed in February: some days or parts are closed — see the official site.
Open in March. No seasonal closure recorded.
Open in April. No seasonal closure recorded.
Open in May. No seasonal closure recorded.
Open in June. No seasonal closure recorded.
Open in July. No seasonal closure recorded.
Open in August. No seasonal closure recorded.
Open in September. No seasonal closure recorded.
Open in October. No seasonal closure recorded.
Open in November. No seasonal closure recorded.
Partly closed in December: some days or parts are closed — see the official site.
Checked against the official site on 2026-10-15.
Japan's largest basalt sea cave, 64 m high and 90 m deep, with hexagonal and octagonal columns. A sightseeing boat takes you right up to it.
Natural Monument
Nearby
- Sakurai Futamigaura (Itoshima) ≈ 45 min by car
- Nanatsugama Sea Caves ≈ 45 min by car
- Niji-no-Matsubara Pine Grove ≈ 50 min by car
- Karatsu Castle ≈ 50 min by car
- Mt. Kagami (Kagamiyama) ≈ 50 min by car
Travel times are rough estimates by car.
- Getting there
- Bus (Keya Line) from JR Chikuzen-Maebaru Sta. north exit to Keya terminus, then about 10 min walk (few buses)
Few buses — check times or join a tour - Fee
- Boat tour: adults ¥1,000, children ¥500
- Good to know
- Boat tour about 30 min, usually mid-March to November; departures roughly every 45 min on weekdays (30 min on weekends), weather permitting
- Time needed
- 1 h 30 min
Checked against the official Japanese website on 2026-10-15. Report outdated info