Akiyoshido Cave (Mine City, Yamaguchi Prefecture) — Overview (History, Features, and Attractions)
Akiyoshido Cave, located in Mine City, Yamaguchi Prefecture, is one of Japan's largest limestone caves and a representative tourist cave that stretches underground in the Akiyoshidai Karst Plateau. Huge underground spaces, stalactites, and underground rivers can be seen, and its sense of scale and beauty of form are its greatest attractions. The total length of the cave is said to be approximately 10 km, of which about 1 km is open to tourists, allowing visitors to walk through the illuminated cavern and observe the natural formations up close.
Historically, it has been known locally for a long time, and investigations into the cave and partial openings to the public have been underway since the Meiji and Taisho periods. After the war, it was developed as a tourist destination, and is highly regarded as a target for geological and natural science observations, and together with the surrounding Akiyoshidai Plateau, it is also recognized as a geopark.
Highlights
- Large-scale underground space: A series of vast spaces that give a sense of height and depth, giving you the overwhelming feeling of walking through a natural "great hall."
- Stalactites, stalagmites, and stone pillars: A diverse group of stalactites formed over many years. When illuminated by light, they change appearance and make great photos.
- Underground river and waterside scenery: The underground water flowing through the cave and the unique shapes created by the water are also highlights.
- Lighting effects: The walkways and main spots are illuminated, creating a fantastical atmosphere that is different from daytime.
- Surrounding karst plateau (Akiyoshidai): In addition to visiting the cave, you can also enjoy the vast karst topography above and the scenery from the observation deck.
Access (nearest station, transportation, etc.)
- Train + Bus: The nearest major stations are JR Shin-Yamaguchi Station and Mine Station. From Shin-Yamaguchi Station, it is common to access the area by local bus, sightseeing bus, rental car, or taxi. Routes and times change depending on the season and year, so be sure to check the official website or timetable before you depart.
- By car: Accessible via the Chugoku Expressway, Sanyo Expressway, etc., there are parking lots in the surrounding area. Please allow plenty of time for your trip as it can get crowded during the tourist season.
- Transportation: Akiyoshido Cave is one of the main tourist destinations in the Akiyoshidai area, so it may be included in sightseeing buses and tours that take in the Akiyoshidai Karst Road and surrounding tourist facilities.
(Note) Specific bus routes and times, parking locations and fees, taxi fares, etc. are subject to change. For the latest information, please check the Akiyoshido Cave official website or Mine City Tourist Information.
Estimated stay (estimated time required)
- Cave tour only: Approximately 40 minutes to 1 hour on foot (please allow a little more time if you wish to take your time observing and taking photos).
- If you include the cave and the surrounding area (Akiyoshidai Observatory, Museum, etc.): Half a day (2-4 hours) to a full day (at your leisure, including sightseeing and meals).
Nearby spots
- Akiyoshidai Karst Plateau: Vast grasslands and unique limestone topography. Enjoy observation decks, walking trails, and driving courses.
- Akiyoshidai Safari Land (nearby zoos/theme facilities): There are many facilities scattered around the area that are perfect for families (please check opening hours).
- Akiyoshidai Visitor Center/Geopark-related facilities: An exhibition facility where you can learn about the geology and nature of the region.
- Nearby hot springs and roadside stations: Convenient spots for resting, eating, and purchasing souvenirs are dotted around the area.
Things to be aware of (crowds, manners, seasonal precautions, etc.)
- Crowds: It gets crowded during Golden Week, summer vacation, consecutive holidays, and weekends. You may have to wait for parking or to get in, so it's best to arrive early in the morning or visit on a weekday.
- Clothing and footing: The temperature inside the cave is low throughout the year (generally around 15-18°C), and the ground can be slippery in places. We recommend wearing a light jacket and non-slip shoes.
- Manners: The stalactites are very fragile and have been formed over many years. Touching them can cause damage, so please follow the rules, such as not touching them or taking any that have fallen.
- Safety: There are steps and stairs inside the cave. It may be difficult to move around the entire area with a stroller or wheelchair, so please check the barrier-free information beforehand.
- Photography: Generally, photography is permitted, but there may be some areas where photography is restricted due to lighting or preservation reasons. Please abide by the rules in areas where flash photography is prohibited.
- Seasonal precautions: Roads and public transport outside the cave may be disrupted due to typhoons and heavy rain. Please check in advance, especially during bad weather in autumn and winter.
Finally, Akiyoshido Cave is a precious resource created by nature over many years. When visiting, please be mindful of preservation and check official opening hours and access information beforehand.
