page_title: Akkadō
hierarchical_section_title: Akkadō
caption_attribution_description: 日本語: 安家洞内部「神殿」
context_page_description: Akkadō is a limestone cavern located in the town of Iwaizumi, Iwate Prefecture in the Tōhoku region of northern Japan. It has a measured length of 23,702 metres, which makes it the longest in Japan. The cave system was designated as a Natural monument by the Japanese government in 1980. Since 1991, a portion of the caverns have been open to the public for part of the year.
context_section_description: Akkadō (安家洞) is a limestone cavern located in the town of Iwaizumi, Iwate Prefecture in the Tōhoku region of northern Japan. It has a measured length of 23,702 metres (77,762 ft), which makes it the longest in Japan.  The cave system was designated as a Natural monument by the Japanese government in 1980. Since 1991, a portion of the caverns have been open to the public for part of the year.
caption: Inside the Akkadō
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