Keya Oto

芥屋大門

Keya no Oto is a nationally famous scenic rock formation (with hexagonal and octagonal basalt rocks forming columnar joints) located in the Genkai Quasi-National Park. At 64m high, 90m deep, and 10m wide, it is Japan’s largest basalt cave (among Japan’s three great basalt caves: Keya no Oto, Nanatsugama in Karatsu, and the Genbudo Caves in Toyooka City, Hyogo Prefecture), offering a mystical sight to behold.
The Keya swimming beach located nearby has very clear waters. This shallow beach makes it a popular spot for family outings and has been selected as one of Japan’s 100 Best Beaches.

Address (Japanese)	福岡県糸島市志摩芥屋677
Address	Shimakeya, Itoshima City
Telephone Number	092-328-2012（芥屋大門観光社）
Contact	Itoshima-shi tourist association
Access	・From JR Chikuhi Line’s Chikuzen-Maebaru station, it takes 30 minutes via bus headed for Keya; get off at the last bus stop ・Around 20 minutes from the Maebaru Interchange, Nishi-Kyushu Expressway”
Website	http://kanko-itoshima.sakura.ne.jp/ja2/?p=204