Among Hokkaido’s hot spring towns, Noboribetsu Onsen stands out as a town of large hotels. According to MetroEngines Research’s room-stock count, 14 lodging facilities with 1,945 rooms are operating within a 1km radius of Noboribetsu Onsen, averaging 139 rooms per property, and just the 4 properties with 201+ rooms account for 1,282 rooms (65.9% of the total). Noboribetsu City’s estimated settled ADR was ¥17,700 in September 2026 (N=15 properties) and ¥23,200 in January 2026, with rates peaking in winter, forming a clear price hierarchy against neighboring Toyako Town (¥13,500), Shiraoi Town (¥11,100) and Muroran City (¥6,800). This article takes stock of the supply, the price hierarchy across the Iburi region, estimated occupancy for the ryokan category, the pull of the hot spring water as reflected in guest reviews, and site-specific conditions such as volcanic and landslide risk. It then estimates per-room Capex and the required ADR for three reinvestment scenarios for large properties: renovation, downsizing, and rebranding. The intended readers are onsen ryokan funds, regional financial institutions and resort operators.

The room stock in this article covers lodging facilities with 10 or more rooms (excluding leisure/love hotels) within a 1,000m radius of Noboribetsu Onsen. “Operating” refers to properties with sales prices confirmed on major booking sites in the most recent 3 months (August–October 2026) (as of October 26, 2026; compiled by MetroEngines Research).

Executive Summary — Supply Unchanged for 9 Years, Rates Peak +30% in Winter

To start with the conclusion: the room stock within 1km of Noboribetsu Onsen has held at 14 properties and 1,945 rooms from 2017 through 2026, with no new supply or exits observed. This almost exactly matches the “Noboribetsu Onsen: 14 properties, 1,936 rooms” published by Noboribetsu City as of April 1, 2023 (Tourism Promotion Group), making it an extremely stable market on the supply side — in other words, one where new entry has effectively not occurred. On the demand side, meanwhile, Noboribetsu City’s estimated settled ADR reached ¥17,700 in September 2026 (+1.7% YoY) and rose to ¥23,200 in January 2026 (+17.1% YoY). The winter (December–February) average of ¥21,300 exceeds the summer-to-early-autumn (June–September) average of ¥17,900 by 19%. That rates peak in winter rather than in the summer high season suggests two factors at work: snow-viewing demand from outside Hokkaido and overseas, and a hot spring brand strong enough to sustain a price band nearly double that of Hokkaido ryokan overall (¥9,800 in September, N=294 properties).

Against that backdrop, the structure of supply defines the room for investment. Of the 14 properties, the 6 with 100+ rooms hold 1,636 rooms (84.1%), while properties opened in 2000 or later number just 2, with 64 rooms (3.3%). Aggregating 16,576 guest reviews (14 properties, most recent 24 months), mentions of the hot springs themselves account for 23.7% and mentions of spring water quality 9.3% (89.2% of them positive), making the appeal of the “water” stand out even within Hokkaido. At the same time, 8.8% of reviews mention the age of guest rooms, indicating a large opportunity for renovation investment. Our estimates show that an interior upgrade centered on Japanese-Western room conversion (¥10–14 million per room) achieves an 8% investment yield with a +¥5,200–7,200 uplift over the large properties’ median estimated ADR of ¥20,700. Adding in-room open-air baths (¥25–35 million per room) requires +¥12,900–18,100, and a rebrand involving downsizing requires around ¥45,000 for the remaining rooms. A small high-rate inn with an estimated ADR of ¥49,800 already exists in the market, so the price band itself has been proven in Noboribetsu.

Market Trends — Noboribetsu’s Estimated Settled ADR Peaks in Winter: +17.1% YoY in January, +1.7% in September

Overlaying Noboribetsu City’s monthly estimated settled ADR (all categories, N=14–15 properties) on the prior year reveals a clear seasonal pattern. In 2025, rates had twin peaks of ¥19,800 in January and ¥19,800 in August. In 2026, the winter peak stepped up, with January at ¥23,200 (+17.1% YoY) and February at ¥20,000 (+7.9% YoY), while summer slightly underperformed the prior year with August at ¥19,100 (−3.6% YoY). September was ¥17,700 (+1.7% YoY), and the full-year profile is shifting toward “earn in winter, hold in summer.” Forward estimates based on listed rates at the time of research (late October 2026) point to another winter peak — ¥19,900 for December 2026, ¥20,800 for January 2027 and ¥21,200 for February (N=14 properties) — though these values will change as check-in dates approach.

Behind this is a shift in visitor composition. According to Noboribetsu City’s tourism statistics (FY2022), the city recorded 2,337,104 tourist visits, 873,526 overnight guests and 105,834 foreign guest-nights, with South Korea (49,806), Taiwan (18,467) and Hong Kong (10,417) the top source markets. In pre-COVID FY2018, the figures were 3,783,291 visits, 1,230,535 overnight guests and 485,892 foreign guest-nights, so foreign stays were still recovering as of FY2022. According to the Hokkaido Shimbun, the city’s tourist count in FY2025 was 3,215,000 (−3.8% YoY), while overnight stays from the US and Australia hit a record high. The pattern of rising rates amid slowing visitor growth indicates the market has entered a phase where revenue is supported by guest quality rather than volume.

The Iburi Price Hierarchy — Noboribetsu’s ¥17,700 Is 1.3x Toyako and 2.6x Muroran

Even within the same Iburi subprefecture, the hierarchy of lodging rates is clear. In September 2026, estimated settled ADR was ¥17,700 in Noboribetsu City (N=15 properties), ¥13,500 in Toyako Town (N=15), ¥11,100 in Shiraoi Town (N=7), ¥10,400 in Tomakomai City (N=19) and ¥6,800 in Muroran City (N=15), placing Noboribetsu at 1.31x Toyako and 2.60x Muroran. In winter (January 2026), the gap widens further: Noboribetsu ¥23,200 versus Toyako ¥14,100, Shiraoi ¥11,500, Tomakomai ¥6,600 and Muroran ¥6,300. Given that the estimated ADR for the ryokan category across Hokkaido is ¥9,800 in September (N=294 properties) and ¥10,800 in January (N=248), Noboribetsu’s ryokan (¥18,800 in September, ¥24,400 in January, N=14) sell at roughly twice the price band of Hokkaido ryokan.

What this suggests is that Noboribetsu serves as the “price ceiling” of the Iburi region. In Toyako Town, a 61-room property with open-air baths in every room is planned for December 2027 (see our supply review of Lake Toya Onsen), meaning upper-tier supply is growing in a neighboring area. Whether Noboribetsu can maintain its current position in the hierarchy — and thicken its upper tier — depends on refreshing the product of its existing large properties.

Supply Stock Review — 14 Properties, 1,945 Rooms Within 1km; 6 Properties With 100+ Rooms Hold 84%

Breaking room stock down by size band: properties under 100 rooms number 8 with 309 rooms (15.9%), 100–299 rooms 4 with 843 rooms (43.3%), and 300+ rooms 2 with 793 rooms (40.8%). In other words, the 6 properties with 100+ rooms alone hold 1,636 rooms (84.1%) — a high concentration in large properties for a hot spring town. Expanding the radius to 3km does not change the result; the same 14 properties and 1,945 rooms are returned. This reflects the fact that Noboribetsu Onsen’s lodging function is almost entirely contained within a 1km radius of the hot spring town.

By founding or opening era, 5 properties founded in 1950 or earlier hold 728 rooms (37.4%), 4 from the 1960s–70s hold 649 rooms (33.4%), and 3 from the 1980s–90s hold 504 rooms (25.9%), while properties from 2000 onward number just 2 with 64 rooms (3.3%). Founding year differs from building completion year, and many large properties have undergone repeated extensions and renovations, so these figures cannot be read directly as building age. Even so, combined with the fact that no new-build supply has been observed in the past 10 years, Noboribetsu Onsen’s product renewal can only proceed through reinvestment in existing properties, not new construction.

We also checked J-REIT ownership. According to our ownership master (as of October 2026), none of the 14 properties above are among the holdings of the 7 hotel-focused and diversified investment corporations: Ichigo Hotel REIT (いちごホテルリート投資法人), Invincible Investment Corporation (インヴィンシブル投資法人), Nippon Hotel & Residential Investment Corporation (日本ホテル＆レジデンシャル投資法人), Japan Hotel REIT (ジャパン・ホテル・リート投資法人), Hoshino Resorts REIT (星野リゾート・リート投資法人), Mori Trust REIT (森トラストリート投資法人) and Kasumigaseki Hotel REIT (霞ヶ関ホテルリート投資法人). Noboribetsu Onsen’s large properties are a market that listed REIT capital has not entered, so private funds, regional financial institutions and operators’ own capital will be the main drivers of reinvestment.

Site Assessment — Commercial Zone (600% FAR) and National Park; Mt. Kuttara Volcano and Landslide Warning Zones

In terms of zoning, the center of the hot spring town is a commercial zone (FAR 600%, BCR 80%), surrounded by neighborhood commercial zones (300%, 80%) and residential zones (200%, 60%). Floor-area constraints on rebuilding or extending large properties are therefore limited, but note that the entire hot spring town lies within Shikotsu-Toya National Park, so landscape consultations under the Natural Parks Act are added to any building plan. The official land price at Noboribetsu Onsen-cho 76-4 was ¥71,200/㎡ (¥235,000/tsubo) in 2026, flat YoY at 0.00% for the second consecutive year (unchanged since 2024), but down −19.5% over the long term from ¥88,500/㎡ in 2019. In the sense that land acquisition costs have not tracked the town’s rising room rates, this is a tailwind for acquiring and reinvesting in existing properties.

Two site-specific risks should be noted: Mt. Kuttara volcano and landslides. As of October 2026, Mt. Kuttara’s volcanic alert level is Level 1 (“keep in mind that this is an active volcano”), and the Japan Meteorological Agency states that “volcanic activity remains calm as before, with no signs of eruption.” Under the volcanic alert level system that began operating in October 2015, an elliptical area of approximately 600m × 1,800m including Jigokudani, Oyunuma and Mt. Hiyori is defined as the “assumed crater area.” At Level 5 (evacuate), entry within approximately 1km of the assumed crater area is prohibited, and at Level 4 (prepare to evacuate), evacuation from the adjacent “specified area” is assumed. Because Jigokudani borders the northern edge of the hot spring town, a substantial portion of the town falls within this 1km zone. Anticipated phenomena are volcanic blocks from phreatic eruptions (human-head-sized rocks reaching about 1km), volcanic mudflows and ash, and the leaflet cites an eruption about 200 years ago as a past example.

Regarding landslides, materials from Noboribetsu City’s “FY2025 Noboribetsu Onsen District Council” show landslide warning zones and evacuation sites designated for 6 neighborhood associations in the hot spring district (Shin-Noboribetsu 27 households, Hiyoriyama 34, Yunotaki 42, Yunohana 46, Aoyama 47, Momijidani 50). At 23:20 on September 13, 2025, a landslide warning was issued for the entire city; a Level 4 response (evacuation order) was taken in the hot spring district, and Senwaen and the Karurusu Kaikan were opened as shelters until morning (the warning was lifted at 1:50 the following morning). From an investment perspective, both volcanic and landslide risks are “low-frequency, wide-area” risks: the probability of occurrence is low, but the impact extends across the entire hot spring town. Property-level BCP (backup power, multilingual evacuation guidance) and participation in the ryokan association’s evacuation plan become evaluation items.

Supply & Demand — Noboribetsu Ryokan Occupancy (Est.) 91%, 3–10pt Above the Hokkaido Average

The depth of demand also shows in occupancy. Estimated occupancy for Noboribetsu City’s ryokan category (based on OTA listed inventory; 10 properties / 1,117 rooms; based on major booking site listings) was 92.7% in June 2026, 90.9% in July, 91.8% in August and 91.0% in September, consistently above Hokkaido ryokan overall (147–178 properties / 6,709–7,500 rooms, daily) at 81.9% in June, 85.2% in July, 86.4% in August and 88.1% in September. The gap narrowed from +10.8pt in June to +2.9pt in September, but this was because autumn demand rose across Hokkaido as a whole; Noboribetsu remained stable in the low 90s. Note that these estimates are based on the sell-through of inventory sold on OTAs and differ from the actual occupancy of each property as a whole.

On a daily basis, weekdays (Tuesday–Thursday) ran 83–94% and Saturdays 94–97%. During the 5-day holiday from September 19 (Sat) to 23 (Wed, holiday), remaining inventory all but disappeared, with occupancy at 99.8% on the 20th (Sun) and 99.5% on the 21st (Mon, holiday), and listed prices (all-plan average, tax-included) for the 19th–22nd jumped to ¥58,000–80,000 (¥32,000 on the final day, the 23rd). Such a wide spread between weekdays and holidays means that mechanisms for capturing full holiday rates (locking in high-rate plans early, releasing inventory close to arrival) are already working, while how to fill the 83–87% weekday band is the growth margin for large properties’ earnings.

The booking curves for both August and September had already reached 79–80% at 45 days before check-in (LT45), then built up gradually to around 85% by LT5, before selling through rapidly to 91–92% in the final 4 days. A curve that is 80% full 45 days out is on the early side for Hokkaido ryokan, indicating early bookings concentrated on holidays and weekends. For December, only 9 days of observations within LT45 were available at the time of research, so we refrain from drawing conclusions, but within the observable range, the curve starts at 75.0% at the same LT45 point — slightly below August–September. The winter peak has yet to form, so this figure should be viewed as an interim reading of booking progress.

Inventory sell-through at individual properties also confirms the depth of demand. For the 4 days of Obon 2026 (August 13–16), among the 12 properties in Noboribetsu City whose OTA public allocation is 30% or more of total rooms (out of 18 properties with data; 78 properties covered citywide), all 12 recorded zero remaining rooms on all 4 days. In particular, Takinoya Bekkan Tamanoyu (24 rooms) was sold out from 45+ days before the stay date, and even a large property such as Noboribetsu Sekisuitei (248 rooms) showed 0 of 248 rooms remaining at LT39 for August 13 and zero remaining at LT34 for August 14 — filling early regardless of size.

The Pull of the “Water” in Guest Reviews — Spring Quality Mentioned in 9.3%, 89% Positive; Noboribetsu Properties Lead Hokkaido Rankings

That the core of Noboribetsu Onsen’s product is its “water” is also confirmed by the structure of review mentions. Among 16,576 guest reviews for 14 properties compiled by MetroEngines Research & Consulting (most recent 24 months, NLP analysis), mentions of the hot springs themselves were the most common at 3,921 (23.7%, 92.2% positive), followed by open-air baths 1,875 (11.3%), spring quality 1,540 (9.3%, 89.2% positive), large public baths 1,509 (9.1%), bath size 883 (5.3%), sauna 824 (5.0%) and bath-hopping / variety of baths 701 (4.2%, 98.1% positive). By language, Japanese accounted for 12,480 (75.3%), English 1,735 (10.5%), Korean 1,188 (7.2%) and Traditional Chinese 649 (3.9%), meaning roughly a quarter were posted in foreign languages.

In the Hokkaido-wide spring quality rankings (positive mentions, most recent 24 months, properties with 10+ mentions), Dai-ichi Takimotokan ranked 1st (303 mentions), Hotel Mahoroba 4th (192), Noboribetsu Grand Hotel 7th (161) and Park Hotel Gatei 8th (151) — 4 of Noboribetsu’s large properties are in the top 8 among Hokkaido’s top 40. In the bath-hopping / variety of baths rankings, Dai-ichi Takimotokan also ranked 1st (307) and Hotel Mahoroba 2nd (248), recognizing a strength unique to large properties: “enjoying a variety of spring types in one hotel.” This is an asset that small inns find hard to replicate, and any reinvestment must renew guest rooms without compromising the value of the bathing experience.

As for guest rooms, room size is highly rated with 1,720 mentions (10.4%, 84% positive), but 1,451 reviews (8.8%) mention the age of the building or rooms, while mentions of renovated rooms (524, 3.2%) were 94% positive. In other words, guests rate the experience as “the baths are perfect; the rooms would be even better if updated,” a structure in which renovation investment is likely to translate directly into improved review ratings. Mentions of in-room open-air baths are few at 414 (2.5%), but at a small inn where they are frequently mentioned, the estimated ADR reaches ¥49,800 (Ryotei Hanayura, 37 rooms), a real-world example showing this price band is viable in Noboribetsu.

Positioning — Large Properties Cluster at ¥14,000–23,000; the ¥25,000–45,000 × 50–200 Room Band Is Empty

Plotting room count against estimated ADR (12-month average, October 2025–September 2026) for the 12 properties for which estimated settled ADR can be calculated reveals the market’s structure. The 4 properties with 201+ rooms line up in the ¥14,100–23,200 band, with a median of ¥20,700. Properties under 100 rooms range from ¥13,100 (a business hotel) to ¥49,800 (a 37-room property centered on rooms with open-air baths), and only one property, with 41 rooms, sits in the ¥25,000–45,000 band. The “mid-size upper-midscale” segment of 50–200 rooms at an estimated ADR of ¥25,000+ is empty — this is the price band large properties can target through renovation and downsizing.

Reinvestment Scenarios — Per-Room Capex and Required ADR for Renovation, Open-Air Baths and Downsizing

Based on the above, we estimate per-room Capex and the ADR uplift needed to achieve an 8% investment yield for three reinvestment scenarios for large properties (starting from the median estimated ADR of ¥20,700). Assumptions: 85% occupancy (full-year, estimate assumption; 310 room-nights per year), 50% GOP flow-through on incremental revenue from renovation, and an 8% target yield of incremental GOP on Capex, using the simplified formula: required ADR uplift = per-room Capex × 8% ÷ 50% ÷ 310 nights. For construction costs, we referenced Archibook’s 2025 compilation based on MLIT Building Construction Statistics (hotels or ryokan; RC construction ¥2.026M/tsubo, all-structure average ¥1.952M/tsubo). Assuming 20–25 tsubo of gross floor area per room for new construction (40㎡ guest room plus common areas) gives approximately ¥40–50 million per room; taking the upper end of approximately ¥50 million per room as the benchmark, we set interior renovation at 20–28% of new-build cost, open-air bath additions at 50–70%, and full renovation with downsizing at 80–100%. For GOP margin, Relo Hotel Solutions puts the general industry benchmark at around 30–40% and notes that ryokan, with a high F&B share, tend to run lower; reflecting this, the post-downsizing P&L applies a current margin of 15% as this article’s assumption.

For Scenario A, given that the citywide estimated ADR already reached ¥23,200 in January 2026, the target of ¥25,900–27,900 is within reach if seasonal peaks are thickened and weekdays are lifted. That reviews of renovated rooms were 94% positive also supports the view that upgrades translate readily into ratings. Since how much a Japanese-Western room conversion lifts rates depends on a town’s price band, see our analysis of rate differentials and payback for ryokan Japanese-Western room conversions for a comparison across municipalities and a payback model for a 30-room property. Scenario B requires ¥33,600–38,800 for the target rooms only, but a small inn centered on open-air-bath rooms is selling at ¥49,800, so even a large property could capture the same demand segment with a subset of upper-floor rooms. Scenario C requires around ¥45,000–50,000 for the remaining rooms, weighed down by the need to recover the GOP lost from the 150 removed rooms with the remaining 250 (for the regulatory treatment of downsizing and examples of 200+ room ryokan, see our article on the downsizing of a 221-room hotel in Oshuku Onsen and 188 ryokan with 200+ rooms nationwide). That said, in an environment where construction costs keep rising around 5% per year, the hurdle for new entrants rises by the same amount, so phased upgrades that leverage existing stock (in the order A → B) also carry upside in the sense of easing competition from new builds.

The sensitivity table above moves one assumption at a time, but since Capex and occupancy can swing together, we also look at them on two axes. The table below shows, for Scenario A, the ADR uplift required for an 8% yield and the resulting target ADR (from ¥20,700) for each combination of per-room Capex (¥10–14 million) and full-year occupancy (75–90%), with GOP flow-through fixed at 50%. If occupancy falls to 75%, the upper-end ¥14 million case yields a target ADR of ¥28,900, widening the gap with the January 2026 citywide level of ¥23,200. Conversely, if 90% occupancy can be maintained, even ¥14 million stays within ¥27,500.

Investment Summary — Noboribetsu’s Opportunity Is Upgrading the Existing 1,945 Rooms, Not New Builds

To sum up: Noboribetsu Onsen is a town of large hotels whose supply has been fixed for 9 years. Its estimated ADR of ¥23,200 in winter and ¥17,700 even in September makes it the price ceiling of the Iburi region, and its ryokan occupancy (est.) of 91% (September 2026, 10 properties) exceeds the Hokkaido average. In reviews, the “water” earns the highest ratings in Hokkaido, while there is ample room for room upgrades. No properties are held by listed REITs, and land prices are flat at ¥71,200/㎡. The investment opportunity this combination points to lies not in adding supply through new construction but in the phased upgrading of the existing 1,945 rooms. Our recommendation is to lead with interior upgrades centered on Japanese-Western room conversion (¥10–14 million per room, target ADR ¥25,900–27,900), then — while checking the response in review ratings and rates — move on to adding open-air baths on upper floors (target ¥33,600–38,800). A rebrand involving downsizing faces a high required-ADR hurdle; even with the example of a 37-room property at ¥49,800, it is an option best decided after seeing the results of the second stage.

As a next step, it would be useful to break down the listed prices and seasonal occupancy differences by room type at target properties, to confirm which room types carry the rate gains in winter (December–February) and holidays. It is also advisable to ascertain, before acquisition, the status of participation in Mt. Kuttara volcano and landslide evacuation plans and the time required for building consultations within the national park. Noboribetsu Onsen is a hot spring town with an asset that is hard to imitate — its water — and remaining room for upgrading its guest rooms, where the “growth margin” for reinvestment is quantifiably visible.

Frequently Asked Questions

Q. How many hotels and ryokan, and how many rooms, are there in Noboribetsu Onsen?
According to MetroEngines Research, there are 14 lodging properties with 10 or more rooms and 1,945 rooms within a 1km radius of Noboribetsu Onsen, a level that has held from 2017 through 2026. Noboribetsu City’s published figure (as of April 1, 2023) also puts Noboribetsu Onsen at 14 properties and 1,936 rooms.

Q. What are room rates in Noboribetsu City?
Estimated settled ADR (2 guests per room, tax-excluded equivalent) was ¥17,700 in September 2026 and ¥23,200 in January 2026. This is about twice the level of Hokkaido ryokan overall (¥9,800 in September) and about 1.3x neighboring Toyako Town (¥13,500 in September).

Q. What site risks should be checked when investing in Noboribetsu Onsen?
Two points: the approximately 1km zone around Mt. Kuttara’s assumed crater area (Jigokudani, Oyunuma, Mt. Hiyori) overlaps a substantial portion of the hot spring town, and landslide warning zones are designated in 6 neighborhood associations of the hot spring district, where a Level 4 evacuation order was issued in September 2025. The volcanic alert level is Level 1 as of October 2026.