Akiyoshi Cave

Akiyoshido Cave, located in Mine City, Yamaguchi Prefecture, is one of Japan's largest limestone caves, extending 100 meters underground within Akiyoshidai Quasi-National Park. It boasts a total length of over 10.7 kilometers, and its magnificent scale is truly breathtaking. The temperature inside the cave remains a comfortable 17°C throughout the year, making it an ideal location for sightseeing.

Akiyoshido is known for its stunning natural formations and has been designated a special natural monument. The cave features various formations of stalactites, among which the group known as "Hyakumai-zara" resembles beautiful terraced rice fields, making it a popular photo spot.

Another highlight is the "King of the Caves," a stalactite around 8 meters tall that takes on a monster-like shape, making it a must-see for Instagram enthusiasts. Additionally, the "300 Million-Year Time Tunnel" offers a highly entertaining experience, where visitors are captivated by light and sound displays.

For adventure lovers, there is also an "Adventure Course" available, which provides a thrilling experience climbing ladders and maneuvering through stalactites with a flashlight (additional fees apply).

Furthermore, visitors can enjoy the "Akiyoshido: Dark Romance Experience," where the cave's lighting is turned off, allowing exploration with just one flashlight. A mysterious experience awaits in the darkness (reservation required).

Akiyoshido Cave is filled with natural wonders and beauty, enchanting visitors with its seasonal landscapes throughout the year.

Basic Information

Spot Name
Akiyoshi Cave
Location
〒754-0511 1-3449 Akiyoshi, Akiyoshi-cho, Mine City, Yamaguchi Prefecture, Japan 
Access
About 40 minutes by bus from JR Shin-Yamaguchi Station to "Akiyoshido" (Akiyoshido Cave)
5 minutes by car from “Akiyoshidai IC” via the Chugoku Expressway “Mine East JCT” on the Ogori-Hagi Road.
Parking
Near the main entrance:
- Municipal No.1 Parking Lot (200 cars)
- Municipal No.2 Parking Lot (300 cars)
One-time daily use: Regular cars 500 yen, motorcycles free (only in No.1 Parking Lot)
* Height limit of 2.5m

Near the Kuron谷 entrance:
- Regular cars 120 spaces, buses 10 spaces, both free

Near the elevator entrance:
- Regular cars 150 spaces, buses 2 spaces, both free
Business Hours
8:30 AM - 5:30 PM (last entry at 6:30 PM) from March to November (regular season)
8:30 AM - 4:30 PM (last entry at 5:30 PM) from December to February (off-peak season)
*Entry from the Kurodani entrance and the elevator entrance is until 4:30 PM.
Regular Holiday
Open year-round (including regular business hours during the New Year holidays).
Fees
Adults: 1,300 yen, High school students: 1,300 yen, Middle school students: 1,050 yen, Elementary school students: 700 yen.
Contact Information
Phone Number:0837-62-0305
Official Website

Map

Detailed Information

Akiyoshidai has more than 400 limestone caves. Among them, Akiyoshido is a particularly large giant cavern, measuring about 8.8 kilometers in total length, making it the largest limestone cave in Japan. The cave entrance opens onto Hirotani Polje, and is 20 meters high and 8 meters wide, from which a large amount of groundwater flows out. The interior spaces of the cave are enormous; at “Sengajo,” the ceiling is 30 meters high and the width is 100 meters, with the widest part reaching 200 meters, forming a विशाल underground chamber. Exploration of Akiyoshido has been carried out since the Meiji era and continues to this day.

The history of Akiyoshido’s formation has also been elucidated, and it is thought that the cave space we see today was created over a million years by dissolution caused by groundwater, lowering of the groundwater table, deposition of sand and gravel, collapse of the ceiling, and the development of cave formations. There are many sights to see inside the cave, but the spectacular “Hyakumai-zara” is a beautiful view unmatched anywhere else as a giant rimstone pool.

There are also many cave-dwelling creatures, including six species of bats such as the horseshoe bat on land, small animals such as ground beetles with degenerated eyes, and, in groundwater, many organisms such as the subterranean amphipod Shikoku yokoebi and subterranean freshwater snails like Akiyoshi mijin-tsubo, all with degenerated eyes.

Akiyoshido was formerly called “Taki-ana,” and as a sacred place where gods were believed to dwell, people rarely approached it. From the Meiji period onward, its magnificent scenery began to be introduced, and many tourists later came to visit. In 1926, Crown Prince (later Emperor Showa) visited the cave, and at that time it was named Akiyoshido.

#Waterfalls, valleys, limestone caves

Akiyoshi Cave Movies

探検!秋芳洞の”未公開エリア” 地下に広がる驚きの世界
【山口旅行モデルコース】おすすめ観光地/グルメを巡る1泊2日車旅
山口県観光Vlog動画|ダイジェスト版(ロングVer )秋芳洞|高画質4K| こんにちは!山口県の観光スポットを紹介するVlog動画。今回前編。山口県に興味がある方 続編でお会いしましょう。
[山口観光]日本最大級の鍾乳洞「秋芳洞」と周辺観光(秋吉台、別府弁天池)
秋芳洞 山口県の有名観光スポット 日本最大級の鍾乳洞へ
「山口観光」【3億年のタイムトンネル】特別天然記念物 秋芳洞(あきよしどう) 「最終編」 山口県美祢市にある日本最大級の鍾乳洞。黒谷口から入ると3億年のタイムトンネルに入ることができます。
「山口観光」【特別天然記念物 秋芳洞(あきよしどう)・前編】山口県美祢市にある日本最大級のカルスト台地「秋吉台国定公園」、100から200mの地下に日本最大級の大鍾乳洞、秋芳洞があります。
★【山口県ひとり旅:秋芳洞】探検している気分な大鍾乳洞 山口 観光地 おすすめ 秋吉台 美祢市 JAPAN TRAVEL:AKIYOSHIDO LIMESTONE CAVE, YAMAGUCHI
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