Japan's Largest Limestone Cave: Akiyoshido Cave

Akiyoshido Cave, located in Mine City, Yamaguchi Prefecture, is one of Japan's largest limestone caves and has been designated as a Special Natural Monument by the government. The total length of the cave is approximately 11.2 km, with about 1 km open to the public as a tourist route. Inside the cave, the temperature remains constant at around 17°C throughout the year, making it comfortable to explore with a light jacket during summer 💡 There are three entrances to the cave, but the most recommended one is the main entrance near Municipal Parking Lot No. 1. The scenery just before entering the cave is stunning. While the municipal parking lot costs 500 yen, there are privately operated parking lots nearby that charge between 100 to 200 yen, allowing for budget-friendly options◎ As a popular tourist destination, the cave tends to get crowded around noon, so visiting early in the morning is highly recommended. On weekends, there are circular sightseeing buses available, making it convenient to explore nearby attractions as well. ⸻ 🕒 Operating Hours • Regular Season (March–November): 8:30 AM–5:30 PM (Cave closes at 6:30 PM) • Off-Season (December–February): 8:30 AM–4:30 PM (Cave closes at 5:30 PM) • Entry from Kurotani Entrance or Elevator Entrance is allowed until 4:30 PM ⸻ 💴 Admission Fees • Adults (High school students and above): 1,300 yen • Middle school students: 1,050 yen • Elementary school students: 700 yen ⸻ 📍 Access • Address: 3449-1 Akiyoshi, Akiyoshicho, Mine City, Yamaguchi Prefecture, 754-0511 • Public Transportation: About 40 minutes by bus from JR Shin-Yamaguchi Station, get off at "Akiyoshido" and walk about 10 minutes • By Car: About 5 minutes from "Akiyoshidai IC" via the Ogori-Hagi Road, accessible from the Chugoku Expressway "Mine East JCT" ⸻ 🚗 Parking Information • Municipal Parking Lot No. 1 (200 spaces) & No. 2 (300 spaces): 500 yen per car, free for motorcycles (No. 1 only) • Kurotani Entrance Parking Lot (120 car spaces, 10 bus spaces): Free • Elevator Entrance Parking Lot (150 car spaces, 2 bus spaces): Free ⸻ 🌟 Adventure Course Adventure Course (300 yen): Experience thrilling activities like climbing ladders and squeezing through gaps between stalactites while holding a flashlight. If you plan to take on this challenge, make sure to wear sneakers and pants!