Gyokusendō Cave

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Gyokusendō Cave () is a limestone cave located in Nanjo, Okinawa Prefecture, Japan. The cave extends for approximately 5 kilometers, with around 850 meters developed for public access as part of the Okinawa World theme park. It is one of the longest caves in Japan and features limestone formations and underground water channels.

Location

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Map showing the location of Gyokusendō Cave

The cave is located within the Okinawa World theme park in Tamagusuku‑Maekawa, Nanjo City. The site is approximately 30 minutes by car from Naha and can be reached via National Routes 331 and 507. Bus services from Naha Bus Terminal (lines 51, 54, 81, 82, and 83) stop at “Gyokusendō-mae,” situated directly in front of the park entrance. The internal temperature remains around 21 °C with high humidity.

History

The Cave was discovered in 1967 during digging work in the area. In 1970, researchers conducted a survey to study its structure. A portion of the cave was opened to the public in 1972, and walkways and lighting were added in 1973 to improve access. In 1990, additional facilities such as a museum and restaurant were built. The cave was designated a natural monument in 1994. In 2013, renovations were made to install energy-efficient lighting and modern air systems.

File:Syouryuu no kane gyokusendou cave okinawa.JPG|alt=昇龍の鐘 (Shōryū no Kane)|Bell of the Rising Dragon (昇龍の鐘) File:Syounyuuseki gyokusendou okinawa1.JPG|Stalactite formations inside Gyokusendō Cave File:Kosyukura gyokusendou okinawa1.JPG|Entrance to the old sake brewery inside the Cave File:Kaseki gyokusendou okinawa.JPG|Fossil remains of the prehistoric Ryukyu Deer (リュウキュウシカ) visible within the cave walls File:地煙の滝.jpg|Underground waterfall inside the Cave, The stone marker identifies the feature as (地煙の滝) (Jien no Taki), meaning "Earth Mist Falls."