Monthly Report: October 2026
Nov 2, 2026
Based on measurement data from the sauna device, we present the October 2026 rankings based on the "T-Flow Score." Because it is an objective indicator that fluctuates with changes in sauna styles, seasons, weather, facility improvements, and events, it is updated monthly.
Nationwide T-Flow Score Ranking
Ranked in descending order of average T-Flow Score, targeting facilities with 10 or more sauna device users.
| Rank | Facility Name | Prefecture | T-Flow Score |
|---|---|---|---|
| 1 | SAUNA & SPA Soleil | Shiga Prefecture | 86.37 |
| 2 | Yukemuri no Sato Susukino | Kanagawa Prefecture | 86.36 |
| 3 | Shisui Onsen Yura no Sato | Chiba Prefecture | 85.79 |
| 4 | Yokosuka Onsen Yura no Sato | Kanagawa Prefecture | 85.72 |
| 5 | Suruga no Yu Sakaguchiya | Shizuoka Prefecture | 85.63 |
| 6 | Yugokoro Yururi | Aichi Prefecture | 85.16 |
| 7 | Nagoya Sauna | Aichi Prefecture | 85.13 |
| 8 | Ninosa Sano | Tochigi Prefecture | 85.13 |
| 9 | Natural Spring Ginto Toji Juraku | Hyogo Prefecture | 85.04 |
| 10 | Onkutsu Sauna Kamazo | Gunma Prefecture | 84.94 |
Spotlight Analysis
#1 T-Flow Score Nationwide
SAUNA & SPA Soleil
Located in Nagahama City, Shiga Prefecture, this complex sauna and hot bath facility features a tower sauna, meditation sauna, and private saunas. In addition to medicinal and carbonated baths, it offers a relaxation room, restaurant, and fitness gym, allowing guests to unwind all day long.Official Website
With a high proportion of morning usage, there is a trend of many people calmly enjoying their sauna sessions early in the day. The short transition times from the sauna to the cold bath and rest area, combined with securing ample rest time within each set, may contribute to achieving a calm totonoi state.
Compared to the average of other facilities, the morning usage rate is high at 31.8%, showing that it is well utilized during refreshing morning hours. While the total stay time per set is compact, longer rest periods are taken, and transitions to the cold bath are smooth. Alternating between hot and cold at an efficient pace and taking thorough rest may contribute to the high T-Flow Score.
The deep dive in this article is an interpretation based on measurement data and does not reflect factors outside the data, such as facility operations, equipment, or brand awareness.
Trending Ranking
These are facilities where the number of users grew compared to the previous month. 250% means the number of users increased by 2.5 times.
| Rank | Facility Name | Prefecture | Popularity Growth |
|---|---|---|---|
| 1 | Yunohana Asariden | Hokkaido | +217% |
| 2 | Happo no Yu | Nagano Prefecture | +200% |
| 3 | Sauna New Kanako | Kanagawa Prefecture | +178% |
| 4 | Natural Hot Spring Kakitsubata | Aichi Prefecture | +170% |
| 5 | Natural Spring Ginto Toji Juraku | Hyogo Prefecture | +160% |
| 6 | Ikenotaira Hotel Koten no Yu | Nagano Prefecture | +160% |
| 7 | Natural Open-Air Hot Spring Spa Suminoe | Osaka Prefecture | +150% |
| 8 | Momi no Yu | Saitama Prefecture | +140% |
| 9 | Asian Resort Spa Seare | Hiroshima Prefecture | +140% |
| 10 | Ofuro Cafe Ageki Onsen | Mie Prefecture | +140% |
Spotlight Analysis
Attention Rank #1
Yunohana Asariden
A day-use natural hot spring facility located in Otaru, Hokkaido. In the sauna equipped with auto-löyly, you can enjoy refreshing heat and waves of steam, and a coworking space is also available for work and remote working. Official Website
Regarding user trends, 41.5% of visits take place during the morning hours, which is remarkably high compared to the average of other facilities. Many users cycle through sets at a brisk pace with slightly shorter cold bath and rest times, suggesting a preference for starting the day refreshed.
Compared to the average of other facilities, the proportion of users visiting in the early morning hours is strikingly high. With slightly shorter times spent in the cold bath and resting, many users likely repeat sets at a comfortable, brisk pace. It appears that a Sauna Style of smartly enjoying an average of 3.3 sets during the active morning hours has become well established.
The deep dive in this article is an analysis based on measurement data and does not indicate factors beyond the data, such as facility operations, equipment, or awareness.
T-Flow Score Growth Rate Ranking
These are facilities where the average T-Flow Score increased compared to the previous month. For example, +25.2% indicates that the average increased by 25.2%.
| Rank | Facility Name | Prefecture | Growth Rate |
|---|---|---|---|
| 1 | Kuramae Onsen Sarasanoyu | Osaka Prefecture | +5.53% |
| 2 | Seto Ohashi Shikoku Kenkomura | Kagawa Prefecture | +5.31% |
| 3 | Ogaki Natural Onsen Yunoshiro | Gifu Prefecture | +3.97% |
| 4 | Funabashi Onsen Yurano Sato | Chiba Prefecture | +3.84% |
| 5 | Safi Spa Maiko | Hyogo Prefecture | +3.66% |
| 6 | Kanzaki Sanga Sauna | Gifu Prefecture | +3.65% |
| 7 | Nakazato Onsen | Akita Prefecture | +3.51% |
| 8 | Yokosuka Onsen Yurano Sato | Kanagawa Prefecture | +3.37% |
| 9 | Miyazawako Onsen Kirari Bettei | Saitama Prefecture | +3.00% |
| 10 | Yu-topia Sendai Minami | Miyagi Prefecture | +2.82% |
Spotlight Analysis
#1 in T-Flow Score Growth Rate
Kuramae Onsen Sarasa no Yu
A natural hot spring facility located in Sakai City, Osaka Prefecture, where you can enjoy free-flowing natural hot springs certified as therapeutic springs. In addition to a wide variety of baths such as carbonated and steam baths, it also offers Aufguss events and bedrock baths, allowing you to relax comfortably all day long.Official Website
Compared to the average of other facilities, there is a tendency to spend plenty of time in the sauna and cold plunge. The transition from the cold plunge to rest is also made quickly, and this calm, deep approach to each Set may be contributing to the growth in T-Flow Score.
While the duration spent per Set is on par with the average of other facilities, time spent in the sauna room is relatively long at 11.5 minutes, and plenty of time is also set aside for the cold plunge and subsequent rest. The transition time from the cold plunge to rest is also short at 43.6 seconds, indicating that guests transition to rest without delay after cooling down. A Sauna Style of enjoying hot-and-cold contrast bathing at one's own pace, especially during the afternoon, may be contributing to achieving totonoi.
The deep dive in this article is an interpretation based on measured data and does not indicate factors outside the data, such as facility operations, equipment, or brand awareness.
T-Flow Score Ranking by Prefecture
This is the average T-Flow Score for each prefecture. Depending on data availability, featured facilities are listed for each prefecture.
| Rank | Prefecture | T-Flow Score | Featured Facility |
|---|---|---|---|
| 1 | Shiga Prefecture | 80.74 | Chomeiji Onsen Tenyo no Yu |
| 2 | Wakayama Prefecture | 80.68 | Gokuraku Onsen Sachi no Yu |
| 3 | Iwate Prefecture | 80.60 | Ichinoseki Onsen Yururi no Yu |
| 4 | Gifu Prefecture | 80.44 | FIT-EASY Gifu Masaki / SAUNA |
| 5 | Gunma Prefecture | 80.31 | Maebashi Yasuragi no Yu |
| 6 | Niigata Prefecture | 80.23 | Gokurakuyu Makio |
| 7 | Hiroshima Prefecture | 80.16 | Yu-poppo |
| 8 | Fukushima Prefecture | 80.15 | Dormy Inn Express Koriyama |
| 9 | Kanagawa Prefecture | 80.10 | Sagamiko Onsen Ururi |
| 10 | Shimane Prefecture | 80.09 | Izumo Ekimae Onsen Lamp no Yu |
Spotlight Analysis
Shiga Prefecture Pick Up
Chomeiji Onsen Amaha no Yu
A day-use hot spring facility located in Omihachiman City, Shiga Prefecture, featuring a variety of baths such as radium hot springs, carbonated baths, and lying-down baths, as well as saunas. With a terrace offering a panoramic view of Lake Biwa and a Japanese restaurant serving Omi beef dishes, you can spend a relaxing time after taking a bath. Official Website
While the duration per Set is relatively short and compact, there is a noticeable tendency for users to complete a solid number of Sets. It appears that visitors enjoy their sauna sessions with a well-defined rhythm, spending calm and relaxing time from the cold bath through to the rest period.
Although the duration per Set is on the shorter side, users tend to complete a higher number of rounds, averaging 3.8 Sets per person. It suggests a preference for a style that builds a sense of fulfillment at a brisk tempo: keeping sauna and cold bath durations moderately concise while transitioning leisurely into rest to thoroughly catch one's breath.
The deep-dive analysis in this article is an interpretation based on measured data and does not reflect factors outside the data, such as facility operations, equipment, or awareness.
That concludes the Monthly Report for October 2026.
Have a wonderful sauna life this month as well!