{"id":58020,"date":"2026-07-03T12:56:33","date_gmt":"2026-07-03T03:56:33","guid":{"rendered":"https:\/\/vtrip-japan.com\/45_0081\/"},"modified":"2026-07-03T13:17:48","modified_gmt":"2026-07-03T04:17:48","slug":"45_0081","status":"publish","type":"post","link":"https:\/\/vtrip-japan.com\/en\/45_0081\/","title":{"rendered":"Inazumi Underwater Stalactite Cave"},"content":{"rendered":"<p>Inazumi Underwater Cave, located in Bungo-Ono City, is one of Japan&#8217;s largest and most mysterious underwater limestone caves, formed about 300 million years ago in the Paleozoic era and submerged by the massive Aso volcanic eruption 300,000 years ago. Inside the cave, the crystal-clear water shines in a brilliant blue color, and the dynamic natural formations alongside countless stalactites illuminated beautifully by fine light-ups grant deep core emotion and surprise to global travelers. The temperature inside remains a comfortable 16 degrees Celsius throughout the year, offering an excellent master power spot to experience Earth&#8217;s eternal history and great life force while being completely cut off from modern digital business.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Inazumi Underwater Cave, located in Bungo-Ono City, is one of Japan&#8217;s largest and most mysterious underwater limestone caves, formed about 300 million years ago in the Paleozoic era and submerged by the massive Aso volcanic eruption 300,000 years ago. Inside the cave, the crystal-clear water shines in a brilliant blue color, and the dynamic natural formations alongside countless stalactites illuminated beautifully by fine light-ups grant deep core emotion and surprise to global travelers. The temperature inside remains a comfortable 16 degrees Celsius throughout the year, offering an excellent master power spot to experience Earth&#8217;s eternal history and great life force while being completely cut off from modern digital business.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1344],"tags":[],"class_list":["post-58020","post","type-post","status-publish","format-standard","hentry","category-oita"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Inazumi Underwater Stalactite Cave | V-Trip Japan<\/title>\n<meta name=\"description\" content=\"Inazumi Underwater Cave, located in Bungo-Ono City, is one of Japan&#039;s largest and most mysterious underwater limestone caves, formed about 300 million\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Inazumi Underwater Stalactite Cave | V-Trip Japan\" \/>\n<meta property=\"og:description\" content=\"Inazumi Underwater Cave, located in Bungo-Ono City, is one of Japan&#039;s largest and most mysterious underwater limestone caves, formed about 300 million\" \/>\n<meta property=\"og:url\" content=\"https:\/\/vtrip-japan.com\/en\/45_0081\/\" \/>\n<meta property=\"og:site_name\" content=\"V-Trip Japan\" \/>\n<meta property=\"article:published_time\" content=\"2026-07-03T03:56:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-03T04:17:48+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/vtrip-japan.com\/wp-content\/uploads\/2025\/12\/ogp.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"V-trip Japan\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"V-trip Japan\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/45_0081\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/45_0081\\\/\"},\"author\":{\"name\":\"V-trip Japan\",\"@id\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/#\\\/schema\\\/person\\\/cb1e0eb086de3caefb0e3bbe14cbbcb5\"},\"headline\":\"Inazumi Underwater Stalactite Cave\",\"datePublished\":\"2026-07-03T03:56:33+00:00\",\"dateModified\":\"2026-07-03T04:17:48+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/45_0081\\\/\"},\"wordCount\":112,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/#organization\"},\"articleSection\":[\"Oita\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/45_0081\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/45_0081\\\/\",\"url\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/45_0081\\\/\",\"name\":\"Inazumi Underwater Stalactite Cave | V-Trip Japan\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/#website\"},\"datePublished\":\"2026-07-03T03:56:33+00:00\",\"dateModified\":\"2026-07-03T04:17:48+00:00\",\"description\":\"Inazumi Underwater Cave, located in Bungo-Ono City, is one of Japan's largest and most mysterious underwater limestone caves, formed about 300 million\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/45_0081\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/45_0081\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/45_0081\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u30db\u30fc\u30e0\",\"item\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Inazumi Underwater Stalactite Cave\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/\",\"name\":\"V-Trip Japan\",\"description\":\"See Japan Before You Go.\",\"publisher\":{\"@id\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/#organization\",\"name\":\"V-Trip Japan\",\"url\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/vtrip-japan.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/logo.png\",\"contentUrl\":\"https:\\\/\\\/vtrip-japan.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/logo.png\",\"width\":513,\"height\":513,\"caption\":\"V-Trip Japan\"},\"image\":{\"@id\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/vtrip-japan.com\\\/en\\\/#\\\/schema\\\/person\\\/cb1e0eb086de3caefb0e3bbe14cbbcb5\",\"name\":\"V-trip Japan\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/ab3d5473e9290908aeb171257c9ff47bcee0128667a34637241838eab19814ed?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/ab3d5473e9290908aeb171257c9ff47bcee0128667a34637241838eab19814ed?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/ab3d5473e9290908aeb171257c9ff47bcee0128667a34637241838eab19814ed?s=96&d=mm&r=g\",\"caption\":\"V-trip Japan\"},\"sameAs\":[\"https:\\\/\\\/vtrip-japan.com\\\/\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Inazumi Underwater Stalactite Cave | V-Trip Japan","description":"Inazumi Underwater Cave, located in Bungo-Ono City, is one of Japan's largest and most mysterious underwater limestone caves, formed about 300 million","robots":{"index":"noindex","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"og_locale":"en_US","og_type":"article","og_title":"Inazumi Underwater Stalactite Cave | V-Trip Japan","og_description":"Inazumi Underwater Cave, located in Bungo-Ono City, is one of Japan's largest and most mysterious underwater limestone caves, formed about 300 million","og_url":"https:\/\/vtrip-japan.com\/en\/45_0081\/","og_site_name":"V-Trip Japan","article_published_time":"2026-07-03T03:56:33+00:00","article_modified_time":"2026-07-03T04:17:48+00:00","og_image":[{"width":1200,"height":675,"url":"https:\/\/vtrip-japan.com\/wp-content\/uploads\/2025\/12\/ogp.png","type":"image\/png"}],"author":"V-trip Japan","twitter_card":"summary_large_image","twitter_misc":{"Written by":"V-trip Japan","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/vtrip-japan.com\/en\/45_0081\/#article","isPartOf":{"@id":"https:\/\/vtrip-japan.com\/en\/45_0081\/"},"author":{"name":"V-trip Japan","@id":"https:\/\/vtrip-japan.com\/en\/#\/schema\/person\/cb1e0eb086de3caefb0e3bbe14cbbcb5"},"headline":"Inazumi Underwater Stalactite Cave","datePublished":"2026-07-03T03:56:33+00:00","dateModified":"2026-07-03T04:17:48+00:00","mainEntityOfPage":{"@id":"https:\/\/vtrip-japan.com\/en\/45_0081\/"},"wordCount":112,"commentCount":0,"publisher":{"@id":"https:\/\/vtrip-japan.com\/en\/#organization"},"articleSection":["Oita"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/vtrip-japan.com\/en\/45_0081\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/vtrip-japan.com\/en\/45_0081\/","url":"https:\/\/vtrip-japan.com\/en\/45_0081\/","name":"Inazumi Underwater Stalactite Cave | V-Trip Japan","isPartOf":{"@id":"https:\/\/vtrip-japan.com\/en\/#website"},"datePublished":"2026-07-03T03:56:33+00:00","dateModified":"2026-07-03T04:17:48+00:00","description":"Inazumi Underwater Cave, located in Bungo-Ono City, is one of Japan's largest and most mysterious underwater limestone caves, formed about 300 million","breadcrumb":{"@id":"https:\/\/vtrip-japan.com\/en\/45_0081\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/vtrip-japan.com\/en\/45_0081\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/vtrip-japan.com\/en\/45_0081\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u30db\u30fc\u30e0","item":"https:\/\/vtrip-japan.com\/en\/"},{"@type":"ListItem","position":2,"name":"Inazumi Underwater Stalactite Cave"}]},{"@type":"WebSite","@id":"https:\/\/vtrip-japan.com\/en\/#website","url":"https:\/\/vtrip-japan.com\/en\/","name":"V-Trip Japan","description":"See Japan Before You Go.","publisher":{"@id":"https:\/\/vtrip-japan.com\/en\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/vtrip-japan.com\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/vtrip-japan.com\/en\/#organization","name":"V-Trip Japan","url":"https:\/\/vtrip-japan.com\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/vtrip-japan.com\/en\/#\/schema\/logo\/image\/","url":"https:\/\/vtrip-japan.com\/wp-content\/uploads\/2025\/12\/logo.png","contentUrl":"https:\/\/vtrip-japan.com\/wp-content\/uploads\/2025\/12\/logo.png","width":513,"height":513,"caption":"V-Trip Japan"},"image":{"@id":"https:\/\/vtrip-japan.com\/en\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/vtrip-japan.com\/en\/#\/schema\/person\/cb1e0eb086de3caefb0e3bbe14cbbcb5","name":"V-trip Japan","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/ab3d5473e9290908aeb171257c9ff47bcee0128667a34637241838eab19814ed?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/ab3d5473e9290908aeb171257c9ff47bcee0128667a34637241838eab19814ed?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/ab3d5473e9290908aeb171257c9ff47bcee0128667a34637241838eab19814ed?s=96&d=mm&r=g","caption":"V-trip Japan"},"sameAs":["https:\/\/vtrip-japan.com\/"]}]}},"_links":{"self":[{"href":"https:\/\/vtrip-japan.com\/en\/wp-json\/wp\/v2\/posts\/58020","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vtrip-japan.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vtrip-japan.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vtrip-japan.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vtrip-japan.com\/en\/wp-json\/wp\/v2\/comments?post=58020"}],"version-history":[{"count":0,"href":"https:\/\/vtrip-japan.com\/en\/wp-json\/wp\/v2\/posts\/58020\/revisions"}],"wp:attachment":[{"href":"https:\/\/vtrip-japan.com\/en\/wp-json\/wp\/v2\/media?parent=58020"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vtrip-japan.com\/en\/wp-json\/wp\/v2\/categories?post=58020"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vtrip-japan.com\/en\/wp-json\/wp\/v2\/tags?post=58020"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}