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The Emperor’s Exclusive Onsen Experience: Top 4 Hidden Hot Spring Retreats

Published: 2026-09-25 👁 101 views
Last updated 2026-09-25 — As winter approaches, it’s the perfect season for a relaxing soak. Thanks to Japan’s abundant hot spring resources, many travelers flock to the country every winter. A renowned online booking platform has selected four popular hidden hot spring lodgings in Japan, offering visitors the chance to explore serene and exclusive onsen havens.

By / Scenic Spots Report  
 
As winter approaches, it’s the perfect season for a relaxing soak. Thanks to Japan’s abundant hot spring resources, many travelers flock to the country every winter. A renowned online booking platform has selected the “Top 4 Popular Hidden Hot Spring Lodgings in Japan,” allowing travelers planning a trip to Japan to discover tranquil and elegant onsen retreats.

The Washinosato Hotel Totsukawa Onsen is famous for its unique valley-bottom open-air hot spring. (Photo/Rakuten Travel, the same below)

In addition to offering high-quality accommodations, secluded locations, and beautiful natural surroundings, local Japanese hidden hot spring lodgings must also uphold the philosophy of small-scale, boutique hot spring inn management to qualify for the honor of hanging the lantern that symbolizes a secret onsen.

Nasu Onsen Daimaru Onsen Ryokan

Tochigi Prefecture’s “Nasu Onsen Daimaru Onsen Ryokan” Boasts the Emperor’s Premium Skin-Beautifying Onsen
Established over 200 years ago, “Nasu Onsen Daimaru Onsen Ryokan” is nestled deep in the mountains of Tochigi Prefecture at an altitude of 1,300 meters. Its unique geographical advantage allows abundant hot spring water to gush directly from behind the ryokan, flowing down the valley to form an onsen stream.

“Nasu Onsen Daimaru Onsen Ryokan,” hidden in the mountains of Tochigi Prefecture at an altitude of 1,300 meters, attracts many visitors drawn by its reputation.

The ryokan’s hot springs are also renowned as the “skin-beautifying onsen,” with mineral-rich waters known for their high moisturizing properties—reportedly sourced from the same supply used at the Emperor’s private villa—drawing many admirers.

Niimi Tsurugi Onsen Ryokan Kazurabashi

Tokushima Prefecture’s “Niimi Tsurugi Onsen Ryokan Kazurabashi” Offers a Tranquil Open-Air Sky Hot Spring Experience
Located in the Iya region of Tokushima Prefecture, once a hidden village where the Heike clan took refuge in the 12th century, this area is ranked alongside Shirakawa-go and Shiiya Village as one of Japan’s three most mysterious regions. The local Niimi Tsurugi Onsen Ryokan Kazurabashi is famed for its open-air sky hot spring, accessible only by cable car up the mountain, offering guests a serene soak amid the tranquil beauty of the forest.

The open-air sky hot spring and valley views are among the standout features of Niimi Tsurugi Onsen Ryokan Kazurabashi.

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