Hot Spring<\/h1><\/div><\/div><\/div><\/div><\/div>All Rooms with Free-Flowing Open-Air Baths and Ocean Views<\/h2><\/div>Mornings waking up to the sound of waves, wrapped in the morning sun.
\nMagical nights where moonlight illuminates the sea.
\nYou can savor every moment with the warmth of the water in your room’s open-air bath.
\nAtagawa Onsen boasts abundant water volume and high spring temperature.
\nYou can enjoy its blessings as many times as you like, whenever you like.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
Spring Quality & Main Benefits<\/h2><\/div><\/div><\/div>Spring Quality
\nSodium-Chloride\/Sulfate Spring
\nTemperature: Approx. 100\u00b0C (One of Japan’s hottest self-gushing springs)
\nVolume: 200 liters per minute<\/p>\n<\/div><\/div><\/div>
<\/div>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>Benefits
\nRecovery from fatigue, Improvement of cold sensitivity, Skin beautifying effect, Relief of neuralgia and
muscle pain, Improvement of chronic skin diseases<\/p>\n<\/div><\/div><\/div><\/div><\/div>
![](\"https:\/\/suiko.by-onko-chishin.com\/wp-content\/uploads\/2025\/10\/Mask-group-1.jpg\")
<\/span><\/div><\/div><\/div>The Beginning of Atagawa Onsen \u2500\u2500
\nWarlord Ota Dokan and the “Miraculous Hot Spring”<\/p><\/h2><\/div>
Atagawa Onsen is said to have been discovered by Ota Dokan, the warlord who built Edo Castle.<\/p>\n
The origin of Atagawa Onsen dates back to when he found steam rising thickly from the ground in a field
and named it “Atagawa” (Hot River).<\/p>\n
Later, in 1931, the excavation of a self-gushing source was successful,
and it reached its peak during the group travel boom in the post-war high economic growth period.
\nEven today, it boasts the highest number of towers per site area in Japan with 13 towers,
and continues to heal the bodies and minds of travelers as a “Showa Hot Spring Town”
utilizing its abundant water volume.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
Wrapped in Steam, Bathing at IZU RETREAT<\/h2><\/div>In the private open-air baths equipped in all rooms, you can enjoy the free-flowing hot spring water of Atagawa Onsen, which boasts an abundant volume.<\/p>\n
The unique design of each room is another characteristic of IZU RETREAT.
In the “Former Grand Bath Suite,” where the former large public bath has been converted into a guest room, we offer a spacious open-air bath of about 20 sqm just as it was back then. There are also rooms where you can enjoy a private sauna along with the open-air bath.<\/p>\n
All open-air baths offer an unobstructed panoramic view of the sea of Higashi-Izu from every room.<\/p>\n<\/div><\/div><\/div>
![](\"https:\/\/suiko.by-onko-chishin.com\/wp-content\/uploads\/2025\/12\/DSCF0597-scaled.jpg\" "\\"DSCF0597\\"")
<\/span><\/div><\/div><\/div><\/div><\/div>![](\"https:\/\/suiko.by-onko-chishin.com\/wp-content\/uploads\/2025\/10\/Mask-group-3.jpg\")
<\/span><\/div><\/div><\/div>Bathing to Enjoy with Five Senses<\/h2><\/div>Our free room service offers a “Tea Bath” experience. You can enjoy drinks and light snacks while soaking in the open-air bath equipped in every room.
\nPlease indulge in a luxurious sensory experience: gazing at the horizon where the sea and sky merge, listening to the sound of the tide, and tasting the flavors of Izu.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"100-width.php","meta":{"footnotes":""},"class_list":["post-730","page","type-page","status-publish","hentry"],"yoast_head":"\n
Hot Spring - IZU RETREAT by Onko Chishin<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hot Spring - IZU RETREAT by Onko Chishin\" \/>\n<meta property=\"og:url\" content=\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\" \/>\n<meta property=\"og:site_name\" content=\"IZU RETREAT by Onko Chishin\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-22T15:44:26+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"65 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\",\"url\":\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\",\"name\":\"Hot Spring - 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All Rooms with Free-Flowing Open-Air Baths and Ocean Views<\/h2><\/div>Mornings waking up to the sound of waves, wrapped in the morning sun.
\nMagical nights where moonlight illuminates the sea.
\nYou can savor every moment with the warmth of the water in your room’s open-air bath.
\nAtagawa Onsen boasts abundant water volume and high spring temperature.
\nYou can enjoy its blessings as many times as you like, whenever you like.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
Spring Quality & Main Benefits<\/h2><\/div><\/div><\/div>Spring Quality
\nSodium-Chloride\/Sulfate Spring
\nTemperature: Approx. 100\u00b0C (One of Japan’s hottest self-gushing springs)
\nVolume: 200 liters per minute<\/p>\n<\/div><\/div><\/div>
<\/div>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>Benefits
\nRecovery from fatigue, Improvement of cold sensitivity, Skin beautifying effect, Relief of neuralgia and
muscle pain, Improvement of chronic skin diseases<\/p>\n<\/div><\/div><\/div><\/div><\/div>
<\/span><\/div><\/div><\/div>The Beginning of Atagawa Onsen \u2500\u2500
\nWarlord Ota Dokan and the “Miraculous Hot Spring”<\/p><\/h2><\/div>
Atagawa Onsen is said to have been discovered by Ota Dokan, the warlord who built Edo Castle.<\/p>\n
The origin of Atagawa Onsen dates back to when he found steam rising thickly from the ground in a field
and named it “Atagawa” (Hot River).<\/p>\n
Later, in 1931, the excavation of a self-gushing source was successful,
and it reached its peak during the group travel boom in the post-war high economic growth period.
\nEven today, it boasts the highest number of towers per site area in Japan with 13 towers,
and continues to heal the bodies and minds of travelers as a “Showa Hot Spring Town”
utilizing its abundant water volume.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
Wrapped in Steam, Bathing at IZU RETREAT<\/h2><\/div>In the private open-air baths equipped in all rooms, you can enjoy the free-flowing hot spring water of Atagawa Onsen, which boasts an abundant volume.<\/p>\n
The unique design of each room is another characteristic of IZU RETREAT.
In the “Former Grand Bath Suite,” where the former large public bath has been converted into a guest room, we offer a spacious open-air bath of about 20 sqm just as it was back then. There are also rooms where you can enjoy a private sauna along with the open-air bath.<\/p>\n
All open-air baths offer an unobstructed panoramic view of the sea of Higashi-Izu from every room.<\/p>\n<\/div><\/div><\/div>
<\/span><\/div><\/div><\/div><\/div><\/div><\/span><\/div><\/div><\/div>Bathing to Enjoy with Five Senses<\/h2><\/div>Our free room service offers a “Tea Bath” experience. You can enjoy drinks and light snacks while soaking in the open-air bath equipped in every room.
\nPlease indulge in a luxurious sensory experience: gazing at the horizon where the sea and sky merge, listening to the sound of the tide, and tasting the flavors of Izu.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"100-width.php","meta":{"footnotes":""},"class_list":["post-730","page","type-page","status-publish","hentry"],"yoast_head":"\n
Hot Spring - IZU RETREAT by Onko Chishin<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hot Spring - IZU RETREAT by Onko Chishin\" \/>\n<meta property=\"og:url\" content=\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\" \/>\n<meta property=\"og:site_name\" content=\"IZU RETREAT by Onko Chishin\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-22T15:44:26+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"65 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\",\"url\":\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\",\"name\":\"Hot Spring - 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Mornings waking up to the sound of waves, wrapped in the morning sun.
\nMagical nights where moonlight illuminates the sea.
\nYou can savor every moment with the warmth of the water in your room’s open-air bath.
\nAtagawa Onsen boasts abundant water volume and high spring temperature.
\nYou can enjoy its blessings as many times as you like, whenever you like.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
Spring Quality & Main Benefits<\/h2><\/div><\/div><\/div>Spring Quality
\nSodium-Chloride\/Sulfate Spring
\nTemperature: Approx. 100\u00b0C (One of Japan’s hottest self-gushing springs)
\nVolume: 200 liters per minute<\/p>\n<\/div><\/div><\/div>
<\/div>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>Benefits
\nRecovery from fatigue, Improvement of cold sensitivity, Skin beautifying effect, Relief of neuralgia and
muscle pain, Improvement of chronic skin diseases<\/p>\n<\/div><\/div><\/div><\/div><\/div>
<\/span><\/div><\/div><\/div>The Beginning of Atagawa Onsen \u2500\u2500
\nWarlord Ota Dokan and the “Miraculous Hot Spring”<\/p><\/h2><\/div>
Atagawa Onsen is said to have been discovered by Ota Dokan, the warlord who built Edo Castle.<\/p>\n
The origin of Atagawa Onsen dates back to when he found steam rising thickly from the ground in a field
and named it “Atagawa” (Hot River).<\/p>\n
Later, in 1931, the excavation of a self-gushing source was successful,
and it reached its peak during the group travel boom in the post-war high economic growth period.
\nEven today, it boasts the highest number of towers per site area in Japan with 13 towers,
and continues to heal the bodies and minds of travelers as a “Showa Hot Spring Town”
utilizing its abundant water volume.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
Wrapped in Steam, Bathing at IZU RETREAT<\/h2><\/div>In the private open-air baths equipped in all rooms, you can enjoy the free-flowing hot spring water of Atagawa Onsen, which boasts an abundant volume.<\/p>\n
The unique design of each room is another characteristic of IZU RETREAT.
In the “Former Grand Bath Suite,” where the former large public bath has been converted into a guest room, we offer a spacious open-air bath of about 20 sqm just as it was back then. There are also rooms where you can enjoy a private sauna along with the open-air bath.<\/p>\n
All open-air baths offer an unobstructed panoramic view of the sea of Higashi-Izu from every room.<\/p>\n<\/div><\/div><\/div>
<\/span><\/div><\/div><\/div><\/div><\/div><\/span><\/div><\/div><\/div>Bathing to Enjoy with Five Senses<\/h2><\/div>Our free room service offers a “Tea Bath” experience. You can enjoy drinks and light snacks while soaking in the open-air bath equipped in every room.
\nPlease indulge in a luxurious sensory experience: gazing at the horizon where the sea and sky merge, listening to the sound of the tide, and tasting the flavors of Izu.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"100-width.php","meta":{"footnotes":""},"class_list":["post-730","page","type-page","status-publish","hentry"],"yoast_head":"\n
Hot Spring - IZU RETREAT by Onko Chishin<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hot Spring - IZU RETREAT by Onko Chishin\" \/>\n<meta property=\"og:url\" content=\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\" \/>\n<meta property=\"og:site_name\" content=\"IZU RETREAT by Onko Chishin\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-22T15:44:26+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"65 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\",\"url\":\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\",\"name\":\"Hot Spring - 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Spring Quality
\nSodium-Chloride\/Sulfate Spring
\nTemperature: Approx. 100\u00b0C (One of Japan’s hottest self-gushing springs)
\nVolume: 200 liters per minute<\/p>\n<\/div><\/div><\/div>
Benefits
\nRecovery from fatigue, Improvement of cold sensitivity, Skin beautifying effect, Relief of neuralgia and
muscle pain, Improvement of chronic skin diseases<\/p>\n<\/div><\/div><\/div><\/div><\/div>
<\/span><\/div><\/div><\/div>The Beginning of Atagawa Onsen \u2500\u2500
\nWarlord Ota Dokan and the “Miraculous Hot Spring”<\/p><\/h2><\/div>
Atagawa Onsen is said to have been discovered by Ota Dokan, the warlord who built Edo Castle.<\/p>\n
The origin of Atagawa Onsen dates back to when he found steam rising thickly from the ground in a field
and named it “Atagawa” (Hot River).<\/p>\n
Later, in 1931, the excavation of a self-gushing source was successful,
and it reached its peak during the group travel boom in the post-war high economic growth period.
\nEven today, it boasts the highest number of towers per site area in Japan with 13 towers,
and continues to heal the bodies and minds of travelers as a “Showa Hot Spring Town”
utilizing its abundant water volume.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
Wrapped in Steam, Bathing at IZU RETREAT<\/h2><\/div>In the private open-air baths equipped in all rooms, you can enjoy the free-flowing hot spring water of Atagawa Onsen, which boasts an abundant volume.<\/p>\n
The unique design of each room is another characteristic of IZU RETREAT.
In the “Former Grand Bath Suite,” where the former large public bath has been converted into a guest room, we offer a spacious open-air bath of about 20 sqm just as it was back then. There are also rooms where you can enjoy a private sauna along with the open-air bath.<\/p>\n
All open-air baths offer an unobstructed panoramic view of the sea of Higashi-Izu from every room.<\/p>\n<\/div><\/div><\/div>
<\/span><\/div><\/div><\/div><\/div><\/div><\/span><\/div><\/div><\/div>Bathing to Enjoy with Five Senses<\/h2><\/div>Our free room service offers a “Tea Bath” experience. You can enjoy drinks and light snacks while soaking in the open-air bath equipped in every room.
\nPlease indulge in a luxurious sensory experience: gazing at the horizon where the sea and sky merge, listening to the sound of the tide, and tasting the flavors of Izu.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"100-width.php","meta":{"footnotes":""},"class_list":["post-730","page","type-page","status-publish","hentry"],"yoast_head":"\n
Hot Spring - IZU RETREAT by Onko Chishin<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hot Spring - IZU RETREAT by Onko Chishin\" \/>\n<meta property=\"og:url\" content=\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\" \/>\n<meta property=\"og:site_name\" content=\"IZU RETREAT by Onko Chishin\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-22T15:44:26+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"65 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\",\"url\":\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\",\"name\":\"Hot Spring - 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In the private open-air baths equipped in all rooms, you can enjoy the free-flowing hot spring water of Atagawa Onsen, which boasts an abundant volume.<\/p>\n
The unique design of each room is another characteristic of IZU RETREAT.
In the “Former Grand Bath Suite,” where the former large public bath has been converted into a guest room, we offer a spacious open-air bath of about 20 sqm just as it was back then. There are also rooms where you can enjoy a private sauna along with the open-air bath.<\/p>\n
All open-air baths offer an unobstructed panoramic view of the sea of Higashi-Izu from every room.<\/p>\n<\/div><\/div><\/div>
<\/span><\/div><\/div><\/div><\/div><\/div><\/span><\/div><\/div><\/div>Bathing to Enjoy with Five Senses<\/h2><\/div>Our free room service offers a “Tea Bath” experience. You can enjoy drinks and light snacks while soaking in the open-air bath equipped in every room.
\nPlease indulge in a luxurious sensory experience: gazing at the horizon where the sea and sky merge, listening to the sound of the tide, and tasting the flavors of Izu.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"100-width.php","meta":{"footnotes":""},"class_list":["post-730","page","type-page","status-publish","hentry"],"yoast_head":"\n
Hot Spring - IZU RETREAT by Onko Chishin<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hot Spring - IZU RETREAT by Onko Chishin\" \/>\n<meta property=\"og:url\" content=\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\" \/>\n<meta property=\"og:site_name\" content=\"IZU RETREAT by Onko Chishin\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-22T15:44:26+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"65 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\",\"url\":\"https:\/\/suiko.by-onko-chishin.com\/en\/hot-spring\/\",\"name\":\"Hot Spring - 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Our free room service offers a “Tea Bath” experience. You can enjoy drinks and light snacks while soaking in the open-air bath equipped in every room.
\nPlease indulge in a luxurious sensory experience: gazing at the horizon where the sea and sky merge, listening to the sound of the tide, and tasting the flavors of Izu.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"100-width.php","meta":{"footnotes":""},"class_list":["post-730","page","type-page","status-publish","hentry"],"yoast_head":"\n