{"id":3110,"date":"2024-04-27T09:00:00","date_gmt":"2024-04-27T00:00:00","guid":{"rendered":"https:\/\/www.guidoor.jp\/yokosuka\/?post_type=news&#038;p=2117"},"modified":"2024-05-13T12:57:12","modified_gmt":"2024-05-13T03:57:12","slug":"kaiyama-underground-bunker-yokosuka","status":"publish","type":"news","link":"https:\/\/www.guidoor.jp\/yokosuka\/new-and-now\/kaiyama-underground-bunker-yokosuka\/","title":{"rendered":"Kaiyama Underground Bunker | YOKOSUKA"},"content":{"rendered":"\n<p>Dive into the depths of Kaiyama Underground Bunker, a hidden stronghold built by the Yokosuka Naval Air Corps during World War II. Partially open to the public, this site also hosts rare tours. Let&#8217;s delve deeper into this historical legacy.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Preserved history since 1944:  Kaiyama Underground Bunker<\/h2>\n\n\n\n<p>The Kaiyama Underground Bunker, located in Oppamacho, Yokosuka City, was a major stronghold constructed by the Yokosuka Naval Air Corps. Excavation of this extensive underground complex, spanning approximately 2 kilometers, commenced around 1944 towards the end of the Pacific War. Situated beneath the Kaiyama Green Park, parts of it have been open to the public since 2021.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"562\" src=\"https:\/\/odoweb.jp\/demo\/yokosuka\/wp-content\/uploads\/2024\/04\/inside_kaiyama_bunker.jpg\" alt=\"\" class=\"wp-image-3052\" srcset=\"https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/inside_kaiyama_bunker.jpg 1000w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/inside_kaiyama_bunker-300x169.jpg 300w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/inside_kaiyama_bunker-768x432.jpg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/odoweb.jp\/demo\/yokosuka\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_front-1024x576.jpg\" alt=\"\" class=\"wp-image-3059\" srcset=\"https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_front-1024x576.jpg 1024w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_front-300x169.jpg 300w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_front-768x432.jpg 768w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_front-1536x865.jpg 1536w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_front-2048x1153.jpg 2048w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_front.jpg 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>The Kaiyama Underground Bunker features numerous entrances across the mountain, dividing it into northern and southern sections. The northern part primarily served as the headquarters, boasting lengthy main tunnels that connected various chambers. Conversely, the southern section comprises large interconnected rooms utilized for the storage of supplies and weapons.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.guidoor.jp\/yokosuka\/wp-content\/uploads\/2024\/04\/kaiyama_underground_bunker_gate-1024x576.jpg\" alt=\"\" class=\"wp-image-3057\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/odoweb.jp\/demo\/yokosuka\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_gate-1024x576.jpg\" alt=\"\" class=\"wp-image-3058\" srcset=\"https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_gate-1024x576.jpg 1024w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_gate-300x169.jpg 300w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_gate-768x432.jpg 768w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_gate-1536x864.jpg 1536w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_gate-2048x1153.jpg 2048w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_gate.jpg 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Moreover, there are separate linked bunker and fuel storage facilities, earning it recognition as one of Japan&#8217;s premier naval underground bunkers due to its scale and structure.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.guidoor.jp\/yokosuka\/wp-content\/uploads\/2024\/04\/A01_01-1024x578.jpg\" alt=\"\" class=\"wp-image-3053\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"578\" src=\"https:\/\/odoweb.jp\/demo\/yokosuka\/wp-content\/uploads\/2024\/04\/A01_05-scaled-1-1024x578.jpg\" alt=\"\" class=\"wp-image-3054\" srcset=\"https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/A01_05-scaled-1-1024x578.jpg 1024w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/A01_05-scaled-1-300x169.jpg 300w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/A01_05-scaled-1-768x434.jpg 768w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/A01_05-scaled-1-1536x868.jpg 1536w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/A01_05-scaled-1-2048x1157.jpg 2048w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/A01_05-scaled-1.jpg 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Guided Tour: Kaiyama Underground Bunker<\/h2>\n\n\n\n<p>Experience a monthly tour where you can immerse yourself in the deep history of the Kaiyama Bunker.<br>Don&#8217;t miss out on this rare opportunity to explore its secrets firsthand.<\/p>\n\n\n\n<p><a aria-label=\"undefined (opens in a new tab)\" href=\"http:\/\/yokosuka.kankoh-guide.com\/kaiyama-chikagou-irai-guide-chirashi.html#%E8%B2%9D%E5%B1%B1%E5%9C%B0%E4%B8%8B%E5%A3%95\" target=\"_blank\" rel=\"noreferrer noopener\">Kaiyama Underground Bunker Tour Official Web page (JP)<\/a><br><a aria-label=\"undefined (opens in a new tab)\" href=\"https:\/\/www.cocoyoko.net\/event\/post-154.html\" target=\"_blank\" rel=\"noreferrer noopener\">Yokosuka Tourist Information Web page (JP)<\/a><br><a aria-label=\"undefined (opens in a new tab)\" href=\"https:\/\/routemuseum.jp\/en\/theme\/navy\/a01\/\" target=\"_blank\" rel=\"noreferrer noopener\">Yokosuka Route Museum Web page (EN)<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Date and Time<\/h3>\n\n\n\n<p>Date: Every 2nd Saturday of the month<\/p>\n\n\n\n<p>Time: 10:00 AM to 12:30 PM<\/p>\n\n\n\n<p><a href=\"http:\/\/yokosuka.kankoh-guide.com\/kaiyama-chikagou-gaido-simekiri-karenda.pdf\" target=\"_blank\" aria-label=\"undefined (opens in a new tab)\" rel=\"noreferrer noopener\">Kaiyama Underground Bunker Calendar (JP)<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Registration<\/h3>\n\n\n\n<p>Registration Link down below<\/p>\n\n\n\n<p><a aria-label=\"undefined (opens in a new tab)\" href=\"http:\/\/entry-data.kankoh-guide.com\/irai-entry\/irai-entry1.php\" target=\"_blank\" rel=\"noreferrer noopener\">Kaiyama Underground Bunker Official Registration Link<\/a><\/p>\n\n\n\n<p>&#8211; Up to 6 participants per registration (1 person or more).<br>&#8211; Participants must be middle school age or older and capable of independent walking.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Registration Deadline and Fee<\/h4>\n\n\n\n<p>&#8211; Registration must be completed by the Friday two weeks before the tour date.<br>&#8211; Tours exceeding capacity will be closed for registration.<br>&#8211; \u00a5700 per person, payment accepted on sight.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Tour Course: Walking through the History<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. 3rd Naval Fort Remnants (Meeting Point)<\/h3>\n\n\n\n<figure><iframe loading=\"lazy\" src=\"https:\/\/www.google.com\/maps\/embed?pb=!1m14!1m8!1m3!1d14761.562806664972!2d139.64479292233446!3d35.31497924088344!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x60184106e234b225%3A0x56101650bd0b83ac!2s3rd%20Naval%20Fort%20Remnants!5e0!3m2!1sen!2sjp!4v1714112322943!5m2!1sen!2sjp\" width=\"400\" height=\"300\" allowfullscreen=\"\"><\/iframe><\/figure>\n\n\n\n<iframe src=\"https:\/\/www.google.com\/maps\/embed?pb=!4v1714112436789!6m8!1m7!1syTrOk1N8I0n2Yw1e69xngA!2m2!1d35.31345529544235!2d139.64717241414!3f73.56396127334048!4f0.8786933386971612!5f1.8770236434909702\" width=\"400\" height=\"300\" style=\"border:0;\" allowfullscreen=\"\" loading=\"lazy\" referrerpolicy=\"no-referrer-when-downgrade\"><\/iframe>\n\n\n\n<h3 class=\"wp-block-heading\">2. Explore inside the Kaiyama Underground Bunker<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">3. Fuel Storage Tanks at Oppama Purification Center<\/h3>\n\n\n\n<figure><iframe loading=\"lazy\" src=\"https:\/\/www.google.com\/maps\/embed?pb=!1m14!1m8!1m3!1d13022.871517200983!2d139.6425902!3d35.3129909!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x6018410508377bd5%3A0xf57127d655694e7e!2z6L-95rWc5rWE5YyW44K744Oz44K_44O8!5e0!3m2!1sen!2sjp!4v1714114110803!5m2!1sen!2sjp\" width=\"400\" height=\"300\" allowfullscreen=\"\"><\/iframe><\/figure>\n\n\n\n<iframe src=\"https:\/\/www.google.com\/maps\/embed?pb=!4v1714114236481!6m8!1m7!1sbxc2oBGRjopJgmLAEIwDtA!2m2!1d35.31262024635371!2d139.6416428435937!3f43.41078500108742!4f10.467116622352862!5f1.0186072721045263\" width=\"400\" height=\"300\" style=\"border:0;\" allowfullscreen=\"\" loading=\"lazy\" referrerpolicy=\"no-referrer-when-downgrade\"><\/iframe>\n\n\n\n<h3 class=\"wp-block-heading\">4. Kaiyama Green Space<\/h3>\n\n\n\n<figure><iframe loading=\"lazy\" src=\"https:\/\/www.google.com\/maps\/embed?pb=!1m18!1m12!1m3!1d1320.196772952828!2d139.64158100690238!3d35.31358483441475!2m3!1f0!2f0!3f0!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x601841059cffc8f9%3A0x25a8de98c85c2a42!2sKaiyama%20Green%20Space!5e0!3m2!1sen!2sjp!4v1714114256562!5m2!1sen!2sjp\" width=\"400\" height=\"300\" allowfullscreen=\"\"><\/iframe><\/figure>\n\n\n\n<figure><iframe loading=\"lazy\" src=\"https:\/\/www.google.com\/maps\/embed?pb=!4v1714114298248!6m8!1m7!1s4U0QLfPEFdMqnBBrLxSomQ!2m2!1d35.31484276315404!2d139.6447683754501!3f198.30538442107823!4f10.420563726796203!5f1.219195118725653\" width=\"400\" height=\"300\" allowfullscreen=\"\"><\/iframe><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">5. Monument of the Birthplace of Naval Preparatory School<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">6. Monument of the Birthplace of Naval Aviation<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">7. Flight Preparatory Trainees Memorial Monument<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">8. Kaiyama Green Space Observatory<\/h3>\n\n\n\n<figure><iframe loading=\"lazy\" src=\"https:\/\/www.google.com\/maps\/embed?pb=!1m14!1m8!1m3!1d13022.763221596904!2d139.6432809!3d35.3136635!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x60184105a2b5f31d%3A0xbe453b6d39606624!2sKaiyama%20Green%20Space%20Observatory!5e0!3m2!1sen!2sjp!4v1714114644402!5m2!1sen!2sjp\" width=\"400\" height=\"300\" allowfullscreen=\"\"><\/iframe><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">9. Oppama Shako-mae Bus Stop (Goal)<\/h3>\n\n\n\n<figure><iframe loading=\"lazy\" src=\"https:\/\/www.google.com\/maps\/embed?pb=!1m18!1m12!1m3!1d419.11871421863884!2d139.6422777990523!3d35.315744852788214!2m3!1f0!2f0!3f0!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x6018410f7583d383%3A0x2455443f13fba277!2z6L-95rWc6LuK5bqr5YmN77yI44OQ44K577yJ!5e0!3m2!1sen!2sjp!4v1714114898115!5m2!1sen!2sjp\" width=\"400\" height=\"300\" allowfullscreen=\"\"><\/iframe><\/figure>\n\n\n\n<figure><iframe loading=\"lazy\" src=\"https:\/\/www.google.com\/maps\/embed?pb=!4v1714114939709!6m8!1m7!1sktgtZmi2o3fnEuNxoeYacQ!2m2!1d35.31558583763418!2d139.6427133639646!3f308.75379277429454!4f2.32172722593468!5f2.296335185274671\" width=\"400\" height=\"300\" allowfullscreen=\"\"><\/iframe><\/figure>\n\n\n\n<p><strong>Total: Approximately 3 km<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Access<\/h2>\n\n\n\n<p>From Keikyu Line&#8217;s &#8220;Oppama&#8221; Station, there are various transportation options available for accessing the Kaiyama underground bunker.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>On Foot<\/strong><\/td><td>Approximately 30 minutes<\/td><\/tr><tr><td><strong>Bus<\/strong><\/td><td>From Keikyu Bus Stop &#8220;Oppama Station Front&#8221;<br><br>\uff3bBus Route 1\uff3d<br> Bound for &#8220;Oppama Shako-mae&#8221; \u2192 Take off at &#8220;Oppama Shako-mae&#8221; \u2192 Approximately 5 minutes on foot<br><br>\uff3bBus Route 2\uff3d<br>Bound for &#8220;Fukaura via Taura&#8221; \u2192 Take off at &#8220;Tokyo Fine-mae&#8221; \u2192 Approximately 10 minutes on foot<\/td><\/tr><tr><td><strong>Taxi<\/strong><\/td><td>Approximately 5 minutes<\/td><\/tr><tr><td><strong>Car<\/strong><\/td><td>Paid parking available in front of the Third Seawall ruins<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Requirements<\/h3>\n\n\n\n<p>1. Maximum of 30 participants. In case of exceeding capacity, registrations will be processed on a first-come, first-served basis. (Confirmation of participation will be sent to the representative after the deadline)<\/p>\n\n\n\n<p>2. Tours require a minimum of 6 participants to proceed. Tours will be canceled if the minimum is not met.<\/p>\n\n\n\n<p>3. Tours proceed with rain but there is a chance that will be canceled in severe weather conditions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Additional Information<\/h3>\n\n\n\n<p>1. Participants will be enrolled in accident insurance, included in the participation fee.<br>2. Details regarding tour precautions and necessary items will be provided in the participation guide on the day of the tour.<\/p>\n\n\n\n<p>For cancellations or inquiries after registration or after the deadline, please contact the following email address.<br><a aria-label=\"undefined (opens in a new tab)\" href=\"mailto:ycg@kankoh-guide.com\" target=\"_blank\" rel=\"noreferrer noopener\">ycg@kankoh-guide.com<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Afternote<\/h2>\n\n\n\n<p>This tour offers a rare opportunity to explore Yokosuka City&#8217;s history and culture while delving into the mysteries and history of the Kaiyama Underground Bunker. Embark on this valuable experience guided by local experts, and uncover the secrets of this facility aimed at subterraneanizing the air corps.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"747\" height=\"420\" src=\"https:\/\/odoweb.jp\/demo\/yokosuka\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_entrance.png\" alt=\"\" class=\"wp-image-3051\" srcset=\"https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_entrance.png 747w, https:\/\/www.guidoor.jp\/yokosuka\/wp_re\/wp-content\/uploads\/2024\/04\/kaiyama_bunker_entrance-300x169.png 300w\" sizes=\"auto, (max-width: 747px) 100vw, 747px\" \/><\/figure>\n","protected":false},"featured_media":3060,"template":"","news_cat":[3],"class_list":["post-3110","news","type-news","status-publish","has-post-thumbnail","hentry","news_cat-cat_event","en-US"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Kaiyama Underground Bunker - 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