¥100K-per-night Sauna Villas: Leveraging the Boom in Wellness & Shared Home Ownership.
"Early capital recovery through membership pre-sales"
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"Income gain from high-end hotel operations"
Effective Land Use & Seeking Asset Owners.
- 8 Key Benefits for Asset Owner-
1. Retain 100% Land Ownership
Operating rights automatically expire at the end of the 35-year term. This ensures a clean execution of future plans,whether returning the land to a vacant state or pursuing redevelopment.
2. Rapid Capital Recycling (Early Investment Recovery)
Receive an immediate distribution of 40% of the sales price for each membership unit sold. Upon sell-out, you will recover over 105% to 108% of your initial investment (approx. ¥31.68M to ¥64.8M).
3. High Tax Efficiency via Ultra-Short Depreciation3. High Tax Efficiency via Ultra-Short Depreciation
By utilizing trailer or container-type assets, achieve ultra-short depreciation over just 4 to 6 years. This allows for significant expensing to drastically reduce operating income and maximize tax strategies.
4. Optimized 35-Year Timeline
Our strategic timeline is perfectly synchronized with financial institutions' maximum development loan repayment periods (35 years), as well as the building’s useful life and depreciation cycles.
5. Fully Managed, Asset-Light Design
We handle everything—from guest acquisition, cleaning, and sauna maintenance to repair management. We completely eliminate unpredictable fixed-cost risks, such as utilities and operational deficit coverage obligations.
6. Hybrid Revenue Share (Projected 10-Year Average Yield: 8.92%–11.83%)
Receive a monthly distribution of 40% of general accommodation revenue. Even if membership sales are slow, unused slots shift to "luxury hotel slots at ¥50K–¥100K per night," rapidly boosting monthly income and ensuring stable investment recovery.
7. Strong Commitment from the Operator (The "2:1 Scheme")
Sauna-in demonstrates its commitment by investing 100% of its own capital to build one out of every three locations nationwide. We operate as a unified partnership, not relying solely on external capital.
8. Realizing a Projected 10-Year Average Yield of 8.92%–11.83%
A next-generation land utilization model structurally designed to hedge against downside risks in sales progress.
01. Partnerships That Sustain Our Business
Sauna-in builds a circular business model that enhances the value of regional assets. We achieve this by collaborating with a diverse range of partners, including asset owners, members, municipalities, local businesses, and financial institutions,while leveraging the unique roles of each.
A Hybrid Liquidation Model of "Membership Sales" x "Hotel Operations"
The asset owner builds a premier private sauna villa (total investment of 30 to 60 million yen). This property is then sold and operated on a shared ownership basis (fractionalized into 36 units) through a membership platform (the Sauna-in membership system). The construction investment is hedged through two avenues: "immediate cash back through rapid recovery as membership units are sold" and "sustained recovery where all unsold units are operated as high-end general hotels, with investment recovered through revenue distribution." This is a rational business design that guarantees a mid- to long-term investment recovery line with greater solidity than typical luxury hotel developments, even if membership sales progress is slower than expected or in the unlikely event that all units remain unsold.
Asset Owner Scheme Diagram
02. Differentiation from Existing Hotels
・Non-Service Luxury
Enjoy complete privacy and freedom as if it were your own second home.
・Accommodates Large Groups (3 to 10+ Guests)
Seamlessly accommodates three-generation families, affluent groups, and corporate executive retreats.
・Optimized for Long-Term Stays
Fully equipped with a kitchen and washing machine.
03. Target Strategy
Inbound Travelers
Sophisticated travelers from the West and Asia seeking Japan's unique "ZEN" spirituality and uninterrupted "immersion."
Japanese Saunners
The destination for executives seeking "complete silence" and "self-confrontation," impossible in public facilities.
Corporate Offsites
Positioning "totoi" (the state of being aligned) in a space free from visual noise as the ultimate solution for modern mental wellness.
04. Why Saunas Are the Ultimate Investment
The Revenue Revolution Driven by the Third Sauna Boom (Third Wave)
Devastating Power as a Customer Attractor
Creates powerful motivation where "having a sauna makes people go (destination-driven visitation)." Attracting customers is possible even in inconvenient locations.
High Return on Investment (ROI)
Overwhelmingly lower initial investment and running costs compared to drilling for hot springs. Reproducible anywhere in the country.
Drug-like Repeatability
The experience of "totoi" (being aligned) involves brain pleasure chemicals, making it highly addictive. Once experienced, it creates customer loyalty that forces them to visit regularly.
05. Comparison: With vs. Without Sauna
Room-by-room comparison at our operated facility, "Gallery Hotel Distortion 9"
1F With Sauna
Average Occupancy Rate: 75%
Projected Annual Balance: ¥11,536,597
2F Without Sauna
Average Occupancy Rate: 45%
Projected Annual Balance: ¥5,484,936
06. The Rapidly Growing "Wellness Tourism" and the Rigidity of Existing Assets
Expanding Market
"Sauna and mindfulness" among the wealthy and executive classes has evolved from a transient boom into an established lifestyle (actual demand). However, neo-luxury, multi-location vacation homes equipped with sauna environments for the "ultimate totoi (state of alignment)" are overwhelmingly scarce in the market.
Limits of Existing Membership Hotels
These systems entail waste, where "unused rights for the year expire (non-refundable)," which does not align with the rationality of busy modern business professionals.
Tied-up Developer Capital
Regional resort and residential developments force developers into long investment recovery periods of 15 to 22 years,with yields significantly slowing amidst soaring construction costs.
07. Three Core Highlights of This Investment Opportunity
The "2:1 Portfolio" Development Scheme: Sharing Responsibilities and Rewards
For every three properties, Asset Partners invest in two, and Sauna-in invests 100% of its own capital in one. By clearly demonstrating "Skin in the game" on the platform side, we secure overwhelming trust from landowners and developers,enabling explosive speed in land acquisition.
A "Multi-Layered Revenue Model" that Avoids the J-Curve
While incorporating our own investment (1/3 of properties), the "membership sales margin" during new development is extremely high, allowing the initial investment to be offset and immediately become cash-positive after membership sales.Robust stock revenue is formed by "monthly management fees + actual accommodation costs + general hotel sales" from existing locations.
A Clean Exit Strategy Limited to 35 Years
The risk of properties becoming a liability after aging, typical of lifelong vacation homes, is completely eliminated by the "automatic expiration of rights upon the completion of the 35-year term." This is a beautiful financial design recognized by professionals, 100% synchronized with development loan and depreciation cycles.
08. Development Types (Three Asset Formats)
We propose the optimal format tailored to your specific land ownership, location, and land-use zones.
■ Profit/Loss Simulation by Plan (Assuming Complete Unit Sell-Out)
Type
Benefits & Features
Trailer / Container House
Locations rich in nature, urbanization control areas, idle land
Type
Newly Built Wooden Villa
Type
Traditional Method Folk House (Kominka)
【Powerful Tax Benefits via Ultra-Short-Term Depreciation】
With a short statutory useful life (4 to 6 years), you can enjoy extremely significant tax-saving effects. As building permits are often not required, rapid development is possible even in urbanization control areas or along the coast.Moving or removing units in the future is also easy.
Benefits & Features
【Overwhelming Design Quality and Realization of High Unit Prices】
Allows for highly flexible architectural design. Creates private spaces commanding maximum unit prices through high thermal insulation and superior design aesthetics.
Benefits & Features
【Revitalization of Historical Value and Inbound Demand】
The revitalization of existing assets. Strong appeal to inbound demand. For folk houses that have exceeded their statutory useful life, tax benefits related to depreciation can also be obtained.
Optimal Locations
Optimal Locations
Resort areas, vacation home areas, elevated terrain
Optimal Locations
Historic streetscapes, periphery of regional cities, tourist destinations
09. Financial Simulation of Initial Investment and Revenue Share
*This is a per-unit income and expenditure roadmap based on the financial plan.
[ Scenario A ]
In the Case of Complete Unit Sell-Out in the Initial Phase (Maximum Potential Reference Value)
If all 36 units are sold straight through within a few months of launch, 40% of the sales revenue will be distributed to the developer as a lump sum, achieving recovery of construction costs from immediately after completion to an ultra-short term.
■ Profit/Loss Simulation by Plan (Assuming Complete Unit Sell-Out)
Grade
Premium
Standard
Entry
Initial Investment Amount(Building + Landscaping + Furniture, etc.)
Membership Sales Price(Total for 36 Units)
¥60 Million
¥4.5M × 36 Units(¥162 Million)
¥45 Million
¥3.35M × 36 Units(¥120.6 Million)
¥30 Million
¥2.2M × 36 Units(¥79.2 Million)
Owner Distribution
(40% of Sales Amount)
+64.8 Million
+48.24 Million
+¥31.68 Million
Remaining Cash upon Complete Sell-Out
(Initial Profit)
+4.8 Million
(108.0% Recovery Rate)
+3.24 Million
(107.2% Recovery Rate)
+1.68 Million
(105.6% Recovery Rate)
* Sauna-in (Operator) will responsibly bear the full cost of all approach expenses to wealthy communities, marketing and advertising costs (15% of the total amount), and ResortX system fees (20%).
[ Scenario B ]
In Case of Slow Sales or Partially Unsold Units in the Long Term
(Risk Hedge Structure)
In professional real estate development, the most crucial aspect to focus on is "downside resilience when sales progress underperforms." sauna 9 (Sauna-in) has established a structure within its terms and conditions that ensures your investment recovery does not fail, even if membership units are not sold immediately or if some units ultimately remain unsold.
[ Sold Membership Slots ]
Immediate cash back of 40% of the price upon completion and contract, based on the number of units sold (Early Recovery)
[Unsold Membership Slots ]
➔ All units sold at high unit prices on Ikyu.com and other platforms as "luxury hotel rooms" for general guests
➔"40% of general accommodation revenue" is distributed to you monthly, maximizing monthly income (Continued Recovery)
▪️Projected 10-Year Average Yield / Profit & Loss Simulation
(*Based on Standard Plan: Initial Investment ¥45 Million / Accommodation Unit Price: ¥50,000 / Occupancy Rate: 55% [Approx. ¥10.037 Million Annual Revenue])
First-Year Capital Distribution (Membership Sales 40%)
¥0 (Recovery Rate 0.0%)
¥24.12 Million (Recovery Rate 53.6%)
¥48.24 Million (Recovery Rate 107.2%)
10-Year Total Recovery Rate
89.22 %
98.21 %
118.31 %
premium【Pattern ①】Membership 0%(Complete Hotel Operations)
comparison item
【Pattern ②】Membership 50%(18 Units Sold / 18 Units Unsold)
【Pattern ③】Membership 100%(36 Units Sold-Out)Entry
Approx. ¥500,000 / Year (General Sales of Unused Member Slots, etc.)
Annual Accommodation Distribution (40% Revenue Distribution)
¥4.015 Million / Year (Annual Yield 8.92%)
¥2.0075 Million / Year (Annual Yield 4.46%)
10-Year Cumulative Recovery
40.15 Million
44.195 Million
53.24 Million
10-Year Average Annual Yield
8.92 %
9.82 %
11.83 %
10. Smart Motivational Design of the Membership System Underpinning High Actual Demand
High sales probability is generated even with our premium pricing tiers—membership fees ranging from 2.2 to 4.5 million yen and monthly dues of 15,000 to 30,000 yen. This success stems from "three rational systems" that perfectly resonate with executives and wealthy individuals focused on actual usage and demand.
Special Actual-Cost Rate of Only 5,500 Yen (Incl. Tax) Per Night for up to 10 Nights We provide overwhelming practical value, enabling stays at less than one-tenth of the general market price while bypassing high-season rate spikes.
Unused Slot Rollover: "Carry Over Up to 5 Nights to the Following Year" We have eliminated the risk of "unused rights expiring (non-refundable)," which is the single biggest concern for busy business professionals.
Unlimited Extended Preference Rate (70% OFF) From the 11th Night Even after utilizing the first 10 nights, you can continue to use the facility 365 days a year from the 11th night onwards at an extraordinary owner-exclusive rate of only 30% of the general market price.
11 Affiliate Infrastructure:
"Trust" and "Exit Strategy" Powered by ResortX
This project adopts the system of "ResortX," the leading platform for resort membership rights.
Legally Transparent Contracts and B2B Fractional Ownership Scheme
The fractional ownership scheme (36 shares) and contract framework are extremely secure, as they utilize the established legal infrastructure of ResortX, a licensed Category 2 Travel Agency.
High Liquidity via X CHANGE
Even if owners wish to relinquish this asset (liquidate into cash) in the future, they can sell or transfer it to a third party at any time through the secondary market (X CHANGE) provided by ResortX. There is absolutely no risk of the asset becoming immobilized as a "burden property."
12. One Ownership, Your Home All Across Japan.
Reciprocal Access Across All Locations
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Resort X
Not only your home base (e.g., Tokyo Kitasando), but all "sauna 9" locations across the country, as well as affiliated properties within the luxury resort network "Resort X," are available for reciprocal use. Throughout your 35-year contract term, you can freely enjoy all newly established locations as if they were your own villa. (*When utilizing facilities of a different grade from your home base or affiliated properties, standard additional fees apply to ensure fairness in quality and convenience, allowing for a seamless reciprocal experience.)
13. [ FAQ ]
Frequently Asked Questions for Developers & Professional Investors
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A. They are optimized based on the land-use zone, site area, and demand strength of the location. Regardless of which grade you choose, the underlying structure remains the same: upon sold-out status of the memberships, 100% or more of the initial investment is swiftly returned, leaving cash in your hands.
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A. Even if memberships remain unsold, the property will operate at 100% capacity as a high-end general hotel listed on major OTAs (Ikyu.com, Airbnb, etc.). Since 40% of the lodging revenue is distributed to you, it automatically shifts into a solid mid-to-long-term investment comparable to conventional hotel development (with an expected yield around 8–14%).
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A. You have absolutely no obligation to cover operational deficits or pay fixed costs. Daily utilities, staffing, and sauna maintenance expenses are entirely funded by the operating side out of management fees and other revenues. You simply receive "40% of sales" with zero fixed-cost risk.
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A. There will be no additional charges to your company. A reserve fund for repairs of 8 million yen per property is secured from the initial sales proceeds, alongside ongoing monthly contributions from membership fees. Therefore, all large-scale repairs and equipment replacements over the 35-year contract term are fully covered by this reserve fund.
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A. Yes, support is available. In addition to the early payout scheme upon sold-out status, the property features a dual structure where loan repayments can be sustained purely through standalone hotel revenue (backed by PMS-integrated projections), making it highly persuasive to financial institutions. We offer one-stop support, including joining you for joint presentations to local banks or non-bank lenders, as well as introducing affiliated partners.
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A. The period is aligned with both the maximum repayment term for development loans from financial institutions (35 years) and the economic useful life of the building. Upon the expiration of the 35-year term, membership rights automatically terminate. This eliminates legal risks such as facilities becoming distressed, unsellable real estate, or being unable to redevelop due to complex ownership rights, allowing for a clean return to vacant land or redevelopment.
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A. We can accommodate projects nationwide. Development is possible starting from a minimum site area of approximately 30 tsubo (approx. 99 m²), covering a wide range of locations including suburban areas, villa districts, and resort regions. When utilizing trailer or container-style models, we can legally deploy projects even in areas with strict Building Standards Act regulations—such as "Urbanization Control Areas" or converted agricultural land—making this an ideal solution for utilizing idle land.
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A. Significant tax advantages can be achieved depending on the asset type. For example, selecting a "trailer or container model" allows the property to be classified as vehicles, equipment, or fixtures, which shortens the statutory useful life to 4 to 6 years. This enables you to record substantial depreciation expenses in a short period, serving as an effective strategy for reducing operating income and optimizing corporate tax for your core business.
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A. It depends on the asset type, but standard timelines are approximately 4 to 6 months at shortest for trailer/container models, and about 8 to 12 months for newly built wooden villa types. "sauna 9" handles everything swiftly in an all-in-one process, from land surveys and planning to administrative consultations and pre-sale preparations for memberships.
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A. If a facility is closed or removed during the 35-year contract term, the agreement is structured so that the asset owner must refund or settle the unexpired portion of the membership distribution funds already received (40% of the sales amount).
Calculation Standard: Initial Distributed Revenue (40%) × (Remaining Years ÷ 35 Years)
Use of Refunded Funds: The funds will be applied toward issuing refunds for unexpired terms to members, or credited as a "right fee settlement to Owner B" when transferring members to another location (Location B).
Therefore, the lump-sum payback profit received initially, as well as a portion of the monthly lodging distributions (revenue share), should be systematically managed and invested in preparation for future business continuity risks, 35-year depreciation, and business preservation.
*(Note: Except in cases of closure due to force majeure such as natural disasters or standard contract expiration, early termination or land sales initiated for the owner's own convenience will similarly incur an obligation to refund the unexpired portion.)
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A. Yes, we offer an exclusive owner allocation reserved strictly for asset partners. Beyond personal or family use, you can access the facility at special priority-discounted rates—making it ideal for employee welfare, client entertainment, or serving as a high-end space to accommodate key business VIPs.
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A. No special preparation is required. Simply provide us with the official map (Kozu), land survey map (Chiseki Sokuryozu), or the property address (lot number). Our specialist team will conduct a free site survey and land-use zone check, and prepare a custom proposal featuring the optimal asset type and projected earnings (simulation report) in as little as three business days.
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A. No, we only accept land that meets our strict selection criteria. To maintain the brand value of "sauna 9," as well as high room rates and a strong likelihood of membership sales, we rigorously evaluate demand forecasts and development cost feasibility based on thorough site surveys. If a project is deemed to have low business viability, we may decline the opportunity; however, this approach strictly protects you from unnecessary upfront investment risks.
Transforming Real Estate Development: 'Zen Sauna Villa Sharing'
We are currently seeking a limited number of Phase 1 Partner Developers, primarily in the Tokyo, Osaka, and Kansai resort areas.
