S P O T / SPOT-353
Akiyoshido Cave
秋芳洞あきよしどう
Beneath the rolling karst grassland of Akiyoshidai — Japan's largest limestone plateau — lies a void that water spent eons hollowing out. Akiyoshido runs 10,300 meters in total, the third-longest cave in the country, and about a kilometer of it is opened to visitors as a path that plunges 100 to 200 meters below daylight. What you walk into does not feel like a single room; it feels like a geology that has gone strange. The signature sight is the 'Hundred Plates' (Hyakumai-zara), a vast cascade of rimstone pools terraced like flooded rice paddies, on a scale almost unmatched anywhere in the world. Above the path rises the 'Golden Pillar' (Ogon-bashira), a 15-meter flowstone column built grain by grain from dripping calcite, the cave's emblem. Add the 5-meter 'Cave Fuji' and a procession of forms too large to read as anything but otherworldly. The cave was once known by the plain name 'Takiana,' the waterfall hole, until the future Emperor Showa visited in 1926 and it was rechristened Akiyoshido. It is a National Special Natural Monument — and one of those rare places where a single photograph tells you exactly why it belongs among the strange.

H I G H L I G H T S
Highlights
- 01A giant limestone cave over 10 km long, third-largest in Japan, designated a National Special Natural Monument
- 02The world-renowned 'Hundred Plates' — terraced rimstone pools cascading like rice paddies
- 03The 'Golden Pillar,' a roughly 15-meter flowstone column that is the cave's symbol
- 04A procession of uncanny underground forms including the 5-meter 'Cave Fuji' pillar
A C C E S S / M E T A
Essentials
- Location
- Yamaguchi Prefecture Mine City
- Address
- 〒754-0511 山口県美祢市秋芳町秋吉3449-1
- Fee
- 大人(高校生以上)1,600円/中学生1,300円/小学生850円(2026年4月1日改定・団体割引あり)
- Hours
- 通常期9:00〜16:30/繁忙期(7〜9月)9:00〜17:30
- Status
- 現存
- Nearest
- JR新山口駅(バス約40分)
- Walk
- 5 min
- Parking
- 市営第1駐車場(200台)・第2駐車場(300台)普通車500円/黒谷・エレベーター入口に無料駐車場あり
- Time
- 1〜1.5時間