Libertyship

Name

Libertyship

Legal name

株式会社Libertyship

Website

https://onesauna.jp

Company type

Private

Founded year

2019

Ownership category

akta.pro rank

Product category

Outdoor Saunas

NAICS

Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (3334)

SIC

Services-Amusement & Recreation Services (7900)

akta.pro primary industry

Sauna & Steam Bath Facilities (HSADAKAC)

Keywords

• Barrel sauna manufacturing
• Outdoor sauna equipment
• Sauna facility design
• IoT sauna management
• Sauna reservation software

Headquarters

HQ city

Miyazaki

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain

Revenue model

1. Barrel Sauna Product Sales: ONE SAUNA sells barrel saunas in three models: Standard (1,800×1,800×1,800mm, up to 4 persons, from ¥1,370,000), Long (1,800×1,800×2,300mm, up to 6 persons, from ¥1,937,000), and Box (2,500×2,500×2,865mm, 6-8 persons, from ¥2,800,000). All prices exclude options and delivery. Products are sold directly through the website and sales team. Delivery via JR Freight to reduce CO2 emissions, approximately ¥150,000 nationwide.
2. kupu sauna Premium Product Sales: Designer sauna products developed with Maruni Woodworking, including kupu sauna Basic (W1,920×D2,000×H2,240mm, ¥4,455,000 including heater), Mini (W1,920×D1,440×H2,240mm, ¥3,850,000 including heater), and Chair (¥396,000). These premium products target luxury residential and high-end hotel/ryokan segments, representing higher ASP than standard barrel saunas.
3. IoT Controller Subscription (ON SAUNA): Monthly subscription service for IoT sauna controller. Initial equipment cost ¥330,000 (tax excluded), plus monthly fee of ¥16,500 (tax excluded). Provides remote pre-heating, temperature monitoring, energy optimization, and safety alerts. Recurring revenue stream from existing sauna owners and new buyers.
4. Sauna Produce / Space Design Services: ONE SAUNA provides full-service sauna facility planning, design, and project management. Services include concept development, business planning, permit assistance, space design (SAUNA YARD), and project coordination. Targets hotels, resorts, glamping operators, and public bath facilities seeking turnkey sauna solutions. Revenue recognized as professional services/project-based fees.
5. Sauna Lease Financing: Through partnership with Sumitomo Mitsui Finance & Lease, ONE SAUNA facilitates lease financing for business operators. Enables 0 yen initial cost for B2B customers, converting to monthly lease payments. ONE SAUNA receives payment from the leasing company for equipment delivered.
6. SAUNA TRAVEL RESERVE Platform: Sauna-specific reservation and management platform with integrated payment processing, customer support, IoT automation, and lock management. Pricing at ¥11,000/month plus 2% transaction fee. Includes SAUNA TRAVEL media platform (400,000 annual sessions) and instabase integration (28 million users) for customer acquisition.
7. Maintenance and Inspection Services (愛サ点検): Sauna maintenance and inspection services including free remote inspections via Zoom and paid on-site professional inspections. Professional service revenue from annual/semi-annual maintenance contracts and one-time inspection fees.

Pricing tiers

Go-to-market motion3 records

Distribution channels6 records

Marketing channels6 records

Core offering

Libertyship operates the ONE SAUNA brand, manufacturing and selling barrel saunas, sauna boxes, kupu sauna premium designer saunas, sauna heaters, and trailer-mounted saunas built from domestically sourced Japanese timber across five regional production teams. The company extends beyond hardware into IoT-based sauna management controllers (ON-SAUNA, Patent No. 7510172), a SaaS reservation platform (SAUNA TRAVEL RESERVE), sauna business consulting (Sauna Produce), landscape-integrated outdoor space design (SAUNA YARD), and maintenance inspection services. Products are sold direct to consumers and B2B operators across Japan.

Product overview

Libertyship operates ONE SAUNA, a Japanese sauna brand built around domestically sourced timber and regional manufacturing. The portfolio centers on physical sauna products — barrel saunas (Standard, Long, Box models), Sauna Box, and the premium Maruni/kupu sauna sub-brand — sold alongside accessories (stoves, trailer sauna). The business extends into service layers: Sauna Produce (concept-to-launch consulting), SAUNA YARD (landscape-integrated space design), ON-SAUNA IoT controller (smartphone-operated remote management), SAUNA TRAVEL RESERVE (reservation/payment/unmanned ops SaaS), SAUNA TRAVEL media (400K-session sauna portal), 愛サ点検 (maintenance inspections), and sauna parking. The kupu sauna (co-developed with Maruni Woodwork) represents the premium design tier. The architecture is a platform of physical products bundled with proprietary software services (IoT, reservation SaaS) and consulting services, united by the 'locally sourced domestic timber' and 'sauna lifestyle' brand positioning.

Differentiator

Problem solved

Functional benefit

Products and services

• Barrel Sauna (バレルサウナ) Tapered cylindrical barrel-shaped sauna made from domestically sourced Japanese timber with nail-free tongue-and-groove assembly. Available in three models: Standard (1,800×1,800×1,800mm, up to 4 persons, from ¥1,370,000), Long (1,800×1,800×2,300mm, up to 6 persons, from ¥1,937,000), and Box (2,500×2,500×2,865mm, 6-8 persons, from ¥2,800,000). Sold direct to individual homeowners, hotels, resorts, and glamping operators; self-build assembly kit available.
• Sauna Box (サウナボックス) Prefabricated box-style sauna available in 2-person and 4-6 person configurations, assembled without nails and fully demountable. Companion product to the barrel sauna line for customers preferring rectangular form factor.
• kupu sauna (マルニサウナ) Premium designer sauna co-developed with Maruni Woodworking and Wataru Kumano using Yoshino Hinoki cypress with half-dome thermal profile. Three models: Basic (W1,920×D2,000×H2,240mm, ¥4,455,000 including heater), Mini (W1,920×D1,440×H2,240mm, ¥3,850,000 including heater), and Chair (¥396,000). Targets luxury residential and high-end hotel/ryokan segments.
• Sauna Stove (サウナストーブ) Sauna heater options including ONE SAUNA original gas heater (propane or city gas), METOS electric stove (200V), Helo Himalaya electric stove, and wood-burning stove. Supports multiple heat sources so customers can choose based on local energy infrastructure.
• Trailer Sauna METOS ASEMA (サウナトレーラー メトスアセマ) Mobile trailer-mounted barrel sauna (METOS ASEMA) that can be towed by a vehicle, enabling portable outdoor sauna experiences for events, glamping, and pop-up operations.
• IoT Sauna Controller / ON-SAUNA (IoTサウナ) Smartphone-based IoT controller system (Patent No. 7510172) sold as standalone hardware + subscription. Initial hardware cost ¥330,000 (tax excluded), monthly fee ¥16,500 (tax excluded). Enables remote heater ON/OFF, timer-based pre-heating with external temperature compensation, temperature monitoring, energy optimization, music playback, LED lighting control, and supports unmanned/autonomous sauna operations.
• SAUNA TRAVEL RESERVE (サウナ予約システム) Sauna-specific reservation, payment, and unmanned operations management SaaS platform. Integrates with instabase (28M-user marketplace), RemoteLOCK smart locks, and ON-SAUNA IoT. Includes 365-day customer support, calendar booking, and LINE/mail newsletter distribution. Pricing ¥11,000/month + 2% transaction fee.
• Sauna Produce (サウナプロデュース) Full-service sauna business consulting covering concept development, business planning, permit assistance, reservation site creation, branding, video production, and SNS/advertising support. Targets hotels, resorts, glamping operators, and entrepreneurs launching sauna businesses.
• SAUNA YARD Sauna area spatial design and production service developed in partnership with landscape design firm Yard Works. Covers layout planning, circulation design, and full landscape integration for sauna-centered outdoor spaces.
• Love Sauna Check / Maintenance Service (愛サ点検) Professional sauna maintenance and inspection service. Includes free Zoom-based remote inspection (30 min) and paid on-site inspection (2 hours). Covers heater voltage checks, element wear, stone replacement, safety verification, and exterior/interior condition assessment. Supports both ONE SAUNA and other brand saunas.
• Sauna Parking (サウナパーキング) Parking reservation service for sauna facilities, enabling visitors to reserve parking at sauna locations via the saunaparking.com platform.

Quantifiable outcome

• Good Design Award 2022 recognition for local-production, local-consumption barrel sauna concept
• +3 more outcomes

Named customers9 records

Segments6 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature5 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• 株式会社マルニ木工 (Maruni Woodworking)coreStrategic or Co-development Partner · 26 August 2025Maruni Woodworking (100-year history, Hiroshima-based furniture manufacturer) and ONE SAUNA co-developed the premium 'kupu sauna' designer sauna brand, combining Maruni's precision woodworking with ONE SAUNA's sauna expertise and designer Wataru Kumano's thermal engineering. Yoshino Hinoki sourced directly from Nara forests. Products sold through both Maruni showrooms and ONE SAUNA channels.
• Yard Works Inc. (造的庭)coreStrategic or Co-development PartnerYard Works (landscape design firm based in Yamanashi Prefecture) partners with ONE SAUNA to offer SAUNA YARD — a comprehensive outdoor sauna space design service combining ONE SAUNA barrel saunas with landscape architecture. The partnership enables turnkey outdoor sauna environment creation.
• 三井住友ファイナンス&リース (Sumitomo Mitsui Finance & Lease)coreChannel Partner/ Reseller/ DistributorPartnership enables B2B lease financing for ALL ONE SAUNA products (barrel saunas, box saunas, SAUNA YARD) with 0 yen initial cost. Nationwide coverage allows operators in any prefecture to access lease financing. Same-day credit assessment available for corporate applicants.
• SANU (Nature Living Brand)coreStrategic or Co-development PartnerSANU (Live with nature brand, 14 nature cabin locations as of 2023) installs ONE SAUNA barrel saunas at SANU 2nd Home locations (Yatsugatake 2nd, Nasu 1st). Both companies share sustainability values including nail-free construction, 100% domestic wood, and environmental regeneration philosophy. SANU's 2nd home subscribers gain sauna access as premium amenity.
• 熊野 亘 (Wataru Kumano, Product Designer)coreStrategic or Co-development PartnerProduct designer Wataru Kumano (kumano design office, Musashino Art University Associate Professor) designed kupu sauna with ONE SAUNA and Maruni Woodworking. Kumano studied in Finland, experienced authentic sauna culture, and trained under Jasper Morrison. His thermal engineering of the half-dome profile (heat circulation, roglyu flow) and material choices (Yoshino Hinoki) define kupu sauna's premium positioning.
• instabase (Space Marketplace)minorGTM or Marketing Partnerinstabase (Japan's largest space reservation platform, 28M users) API-integrated with SAUNA TRAVEL reservation system, providing customer acquisition channel for sauna operators. Expands reach to instabase's user base of space-conscious consumers.
• Regional Woodworking Companies (5 production teams)coreStrategic or Co-development PartnerFive regional production teams across Japan: (1) Miyazaki team with Kawakami Mokuzai (川上木材), (2) Hokkaido team with Kuracra (くらcra) and Haruki (ハルキ), (3) Miyagi team, (4) Tottori team, (5) Kagawa team. Each team uses locally sourced domestic wood for barrel sauna production, enabling local-production/local-consumption model.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• HARVIA: HARVIA is the world's largest sauna heater and sauna room manufacturer (Finland), and parent of Helo (one of Libertyship's heater suppliers). A broad incumbent with global scale, premium product lines, and growing direct Japanese market presence through partnerships and distribution.
• KLAFS: KLAFS is a German premium sauna and spa manufacturer with strong hotel/resort customer base globally. Comparable in serving premium hospitality with turnkey sauna solutions; broader portfolio (steam, infrared, plunge) overlaps with Libertyship's premium positioning.

Emerging players

• NOT A HOTEL: NOT A HOTEL is a Japanese full-private villa subscription/hospitality brand that integrates ONE SAUNA barrel saunas into its properties. Adjacent emerging player in the premium villa/hospitality category that depends on Libertyship for sauna amenities.
• SANU 2nd Home: SANU is a Japanese subscription-based second-home brand installing ONE SAUNA barrel saunas at nature cabin locations. Adjacent emerging player that operates in the same nature-integrated wellness lifestyle segment and shares Libertyship's customer base, though SANU is a real estate operator rather than sauna maker.

Direct peers

• METOS: METOS is a Finnish professional kitchen and sauna equipment supplier (parent of Angst+Pfister group), supplying the ASEMA trailer sauna carried by ONE SAUNA. Comparable in commercial-grade sauna equipment for hospitality and B2B operators, with overlapping customer base in Japan.
• Helo (HARVIA Group): Helo is a 100+ year Finnish sauna heater brand now under HARVIA, supplying the Himalaya tower-style electric stoves offered by ONE SAUNA. Overlaps with Libertyship as both a partner/supplier and a competitor in the premium heater category for barrel saunas.
• Authentica Sauna (Hinoki Lab): Authentica Sauna is a Japanese barrel sauna maker using domestically sourced hinoki and similar nail-free/portable construction concepts. Comparable in product category, target market (premium residential and hospitality), and design-led positioning.
• SAIOLA by Sirocco: SAIOLA is a Japanese barrel sauna brand by Sirocco, offering domestic-wood barrel saunas in similar size and price tiers to ONE SAUNA. Direct competitor in the same Japanese barrel sauna category, targeting similar B2B hospitality and B2C homeowner segments.

Others

• Yard Works: Yard Works is a Japanese landscape design firm partnering with ONE SAUNA on SAUNA YARD integrated outdoor sauna projects. Ecosystem partner that complements Libertyship's hardware with landscape architecture services for premium hospitality clients.
• Maruni Woodworking: Maruni is a 100-year Japanese premium woodworking company and co-developer of the kupu sauna sub-brand with Libertyship. An adjacent ecosystem partner enabling premium distribution (maruni tokyo/osaka showrooms) rather than a competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Libertyship