📜 One of Japan's three greatest limestone caves, designated a natural monument since 1934. 🔍 Features expansive subterranean galleries and deep sunless lakes with breathtakingly clear blue water. # Why Go 🌊 Explore stunning underground lakes illuminated with brilliant blues and greens. 🦇 Home to unique bat varieties, including Brown long-eared, Eastern long-fingered, Hilgendorf's tube-nosed, and Greater horseshoe bats. 🚶 Enjoy a 30-minute tour on elevated walkways, bridges, and stairs. 🔬 Ticket includes entry to the Ryusenshindo Science Museum. # Why Avoid ⚠️ Cave has many stairs and steep slopes, not suitable for baby strollers; wheelchair access is limited. 🧗 270-step staircase, narrow, no turning back halfway; not suitable for those with physical conditions, infirm legs, or acrophobia. 🐾 Pets are not allowed to protect the ecosystem. 🥶 Cave temperature is around 10°C year-round, bring a jacket. 💧 Expect water drips, especially on rainy days. 🚫 No toilets, eating, drinking, or smoking inside the cave. ⚠️ Cave may close due to increased water levels and flooding. 🚧 Can be congested during Golden Week and Bon festival, with one-way routes. # Tips 👟 Wear comfortable shoes as the floor can be wet and stairs are steep. ☔ Raincoats and windcheaters are available for loan (umbrellas also available for rent/borrow from the office on rainy days). 🗓️ Busiest during Golden Week (early May) and Bon festival (mid August), with peak times from 11:00 am to 2:00 pm. # Cost 💰 Adults 1,100 yen, students 550 yen. Disability and group rates available. # Hours 🕒 Open daily, 8:30 am - 5:00 pm (Oct-Apr) or 8:30 am - 6:00 pm (May-Sept). May close due to high water levels. # 🅿️ Parking Multiple car parks available, with the closest just 70m from the cave entrance. # 🚻 Toilets Toilets for disabled available in the park and on the second floor of the Resthouse.