Sauna Ikitai

What Sauna Ikitai does

Sauna Ikitai (株式会社サウナイキタイ) is a Tokyo-based private company founded in 2017 (incorporated 2018-10-10) that operates Japan's largest dedicated sauna facility search and community platform, covering all 47 Japanese prefectures. The product surface is delivered through a responsive web platform (sauna-ikitai.com) and native iOS/Android applications that provide map-based and keyword-based search of sauna facilities with real-time operating status and crowd-sourced congestion data; a user-generated content system (サ活, or sauna activity posts) that has accumulated over 10 million records; a gamified loyalty and lottery system (トントゥ抽選会) where users earn points redeemable for facility-donated prizes; and a digital membership card distributed to individual consumers that unlocks perks at 303+ partner facilities (会員/協賛). Supporting revenue lines include an owned e-commerce storefront (サウナイキタイSTORE) selling branded merchandise, capsule toy series, and the Sa-dokei sauna wristwatch, plus event revenue from the annual National Sauna Products Fair and a fleet of mobile sauna buses (サバス).

The business model is multi-sided and diversified. Consumers are served free of charge through a freemium membership tier capped at 10,000 individual members. Revenue is generated principally via (1) annual facility sponsorship/co-sponsorship (協賛) fees paid by sauna operators seeking visibility, member-card integration, and lottery-prize placement; (2) e-commerce merchandise sales at fixed retail pricing; (3) event-based revenue from tickets and brand collaborations across the National Sauna Products Fair, mobile sauna bus tours, and capsule toy drops; and (4) co-branded promotional campaigns with consumer brands such as 3COINS, Kirin, Pokémon's, THERMOS, Yamazaki Bread, and OVERRIDE. The platform integrates Rakuten Travel for overnight-stay sauna bookings and Stripe for payment processing. Key integrators in the sauna-data ecosystem include Finnish stove manufacturers HARVIA and METOS, whose product data is woven into facility pages.

The customer base spans two primary segments: individual sauna enthusiasts across Japan (the consumer side) and hot spring, super sento, capsule hotel, and resort spa operators (the facility side), with episodic brand-partner collaborations as a tertiary segment. The company is bootstrapped: registered capital is just 1.137 million yen, leadership consists of two officers (representative director Suzuki Yu and director Kozawa Shinnosuke), and there is no recorded VC or PE funding. The brand has been externally validated through Google Play's Best of 2023 Hidden Gem and User Voting awards, and Sauna Ikitai's editorial magazine (サウナイキタイ MAGAZINE) functions as both content marketing and a content moat.

Name

Sauna Ikitai

Legal name

株式会社サウナイキタイ

Website

https://sauna-ikitai.com

Company type

Private

Founded year

2018

Operating status

Operating

Short description

Sauna Ikitai is a Tokyo-based private company that operates Japan's largest dedicated sauna facility search and community platform, covering all 47 prefectures across web and iOS/Android apps. It serves individual sauna enthusiasts with map search, 10M+ user activity posts, and a lottery-based membership program tied to 303+ partner facilities.

Ownership category

akta.pro rank

Product category

Sauna Discovery Platform

NAICS

Web Search Portals and All Other Information Services (519290), Fitness and Recreational Sports Centers (713940)

SIC

Services-Amusement & Recreation Services (7900), Services-Membership Sports & Recreation Clubs (7997)

akta.pro primary industry

Tours, Activities & Experiences Booking Platforms (BPAMAIAJ)

akta.pro secondary industries

POI, Local Listings & Business Directory Platforms (BPAMANAD), Thermal Baths, Hot Springs & Saunas (Onsen, Hammams, Banya, Sauna Worlds) (THAJAHAD), Destination/Activity Booking Marketplaces (Tours & Tickets Aggregators) (THAKAAAH)

Keywords

• Sauna facility search
• Wellness community platform
• Sauna travel booking
• Sauna merchandise retail
• Sauna membership program

Headquarters

HQ city

Nishi-shinagawa

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2C

Offering type

Digital Commerce or Content

Cost components

Marketing or Sales, Operations, Personnel, Technology or R&D, Supply Chain

Revenue model

1. Merchandise / Goods Sales: E-commerce store selling branded sauna goods including sauna hats, towels, sweatshirts, capsule toys, accessories, and co-branded products with partners (3COINS, OVERRIDE, etc.). One-time purchase model.
2. Membership Program Fees (サウナイキタイメンバーズ): Individual consumers pay to become members (上限1万人), gaining access to facility discounts and special perks. Facility owners provide these perks in exchange for member traffic. Revenue is indirect — facilities pay协赞 fees to feature in the members program.
3. Member Facility Sponsorship / Co-sponsorship (協賛): Hot spring and sauna facilities pay to become sponsored/協賛 members, gaining visibility to the platform's user base, member card integration, and promotional placement. Includes both メンバーズ協賛 (user-facing discounts) and トントゥ協賛 (lottery prizes).
4. Event-based Revenue (サバス Tours, 全国サウナ物産展, etc.): Revenue from event tickets, brand partnerships, and promotional collaborations tied to proprietary events such as the mobile sauna bus (サバス), national sauna product fairs, and advent calendars.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels8 records

Core offering

Sauna Ikitai operates an online sauna discovery and community platform delivered through a website (sauna-ikitai.com), iOS app, and Android app, covering all 47 Japanese prefectures. The platform combines map-based facility search, user-generated sauna activity posts (サ活) with photos and temperature reports, real-time congestion data, a gamified point-based lottery (トントゥ), and a 303+ facility membership program. Commercial offerings include a branded e-commerce merchandise store, capsule toy collectibles, the Sa-dokei wristwatch with built-in sauna timer, and Sa-bas mobile sauna bus events.

Product overview

Sauna Ikitai is a platform portfolio centered on a Japanese sauna discovery and community platform. The core offering is a dual-platform service — a website (sauna-ikitai.com) and native iOS/Android mobile app — providing searchable sauna facility listings across all 47 Japanese prefectures, supplemented by a rich community layer: サ活 (sauna activity posts) for visit logs, トントゥ lottery for gamification, and the サウナイキタイ MAGAZINE editorial section. Supporting commercial products include the サウナイキタイSTORE (merchandise e-commerce), capsule toys, and the サ時計 (Sa-dokei) wristwatch. The business model extends through the サウナイキタイメンバーズ loyalty program (300+ partner facilities), the サバス mobile sauna bus fleet, and periodic branded campaigns with partners including 3COINS, Kirin, and Pokémon Sleep. Specialized vertical search verticals cover 泊まれるサウナ (overnight-stay saunas via Rakuten Travel integration), サウナ飯 (sauna-adjacent dining), and 銭湯サ活 (public bath saunas).

Differentiator

Problem solved

Functional benefit

Products and services

• Sauna Ikitai App (iOS/Android) - サウナイキタイアプリ Native iOS and Android application enabling map-based sauna facility discovery across Japan, real-time operating-status filtering, congestion trend display, sauna activity posting with photo uploads and temperature reports, member card access, and app-exclusive features. Free to download.
• Sauna Ikitai Website - サウナイキタイ Web-based sauna discovery and community platform covering all 47 Japanese prefectures, providing keyword, prefecture, and feature-based sauna search, sauna activity posting, overnight-stay sauna search (泊まれるサウナ検索), sauna food search (サウナ飯検索), Sauna Ikitai Magazine editorial content, and member management. Free to access.
• Sauna Ikitai Members Program - サウナイキタイメンバーズ Subscription-style membership program with membership capped at 10,000 individual consumers (free to join). Members receive a digital membership card granting access to discounts (admission fee reductions of 10%+ or 100+ yen), complimentary drinks, food, towel/locker rental, and other perks at 303+ partner sauna and hot spring facilities across Japan. Facilities pay annual sponsorship (賛 fee) for participation.
• Sauna Ikitai STORE - サウナイキタイSTORE Proprietary e-commerce storefront (sauna-ikitai.stores.jp) selling branded sauna-themed merchandise including sauna hats, towels, gowns, sweatshirts, apparel, accessories, and limited-edition collaborative items with partner brands such as 3COINS, OVERRIDE, and THERMOS. Operates on unit pricing with prices typically ranging ~1,000–5,000 yen per item.
• Sa-dokei Sauna Watch - サ時計 Physical wristwatch with a built-in 12-minute countdown timer designed for sauna sessions. Launched via crowdfunding on the Sauna Ikitai platform in December 2024 with general sales starting September 2025. Also offered as experience events (\u30b5\u30a6\u30ca\u306e\u6642\u9593) at select partner facilities.
• Capsule Toy Sauna Kits - カプセルトイ サウナキット Capsule toy (gashapon) collectible series featuring sauna-themed miniature figures and items distributed through vending machines nationwide. Multiple series launched since April 2022 including 'The Sauna', '\u6e6f\u3089\u3063\u304f\u3059', Nordic, capsule hotel, and 神戸クアハウス editions. Sold at unit pricing per capsule.
• Sa-bas Mobile Sauna Bus - サバス Mobile sauna bus service consisting of retired city buses converted into traveling sauna experiences touring Japan. Multiple vehicles (1号車–4号車) operate across different regions including Hamamatsu and Shizuoka. Generates revenue through paid event tickets, brand collaborations (e.g., ももいろクローバーZ special edition bus), and promotional partnerships.

Quantifiable outcome

• 10 million+ sauna activity posts (サ活)
• +3 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

Feature5 records

Partnerships

Eleven partnerships are on record, tiered minor and core.

• 清水みさと (Misato Shimizu) — Sauna Travel AuthorminorGTM or Marketing Partner · 19 February 2025清水みさと, a prominent sauna traveler who visited 30+ countries' saunas, authored '清水みさとの世界のサウナをめぐる冒険' (TRANSIT special edition). She serves as a poster model for Sauna Ikitai, and her book features the platform and the サバス mobile sauna bus.
• 全国サウナ物産展 (National Sauna Products Fair)coreStrategic or Co-development Partner · 8 November 2024Annual event organized/co-organized by Sauna Ikitai to showcase sauna-related products, facilities, and culture. Attracts media coverage and strengthens the platform's role as the central hub of Japan's sauna community.
• サバス移動型サウナバス (Mobile Sauna Bus — retired city bus conversion)coreStrategic or Co-development Partner · 24 July 2024サバス (Sauna Bus) is a proprietary mobile sauna bus — converted retired city buses into traveling sauna experiences. Multiple bus units (1号車 through 4号車) operate across different regions. Special edition collaboration with idol group ももいろクローバーZ for '夏バカ発売記念特別便'. Represents the platform's most distinctive experiential brand asset.
• 3COINS (скин)minorGTM or Marketing PartnerMultiple collaboration product lines (2022, 2023, 2025) with 3COINS discount variety store chain for co-branded sauna-themed merchandise sold nationwide at 3COINS locations, extending brand reach to mainstream consumers.
• 牛乳石膏 (Gyunyushokisei / Milk Soap)minorGTM or Marketing Partner'銭湯サ活' campaign partnership with 牛乳石膏 brand, encouraging users to log visits to traditional sento (public bath) facilities using the platform, co-sponsored content and in-store promotions.
• キリン (Kirin Brewery) — 一番搾りminorGTM or Marketing PartnerBrand campaign 'キリン一番搾り糖質ゼロ×サウナイキタイ ビールも飲みたい' launching 2025-05-25, cross-promoting sauna culture with Kirin's low-carb beer brand.
• 豆浆斯基パン (Yamazaki Bread)minorGTM or Marketing PartnerCollaborative bread product released in Chukyo area (2024-10-01), leveraging the platform's brand for crossover consumer product.
• Pokemon Sleep / 湯乃泉 草加健康センターminorStrategic or Co-development Partnerサとス project collaboration with Pokemon Sleep and 草加睡眠健康センター, combining sauna and sleep wellness themes with Pokemon branding (November 2025).
• OVERRIDE (Fashion brand)minorGTM or Marketing PartnerCollaboration for sauna hat co-branded products sold through Sauna Ikitai's online store. OVERRIDE also hosted pop-up store events.
• THERMOSminorGTM or Marketing PartnerReleased co-branded stainless steel water bottle with THERMOS in collaboration with the platform's mascot character '熱波うけるくん' (2025-06-28).
• 電子チケット (Electronic Ticketing) — using StripecoreTechnology or IntegrationStripe-powered electronic ticket system for facility admission passes. Note: the electronic ticket service appears to have been discontinued per notices in the data, though the payment infrastructure remains.

Scale indicators5 records

Recent moves6 records

Expansion highlights7 records

Broad incumbents

• Jalan (by Recruit): One of Japan's largest domestic travel and leisure booking platforms operated by Recruit. Overlaps with Sauna Ikitai through destination search, onsen/ryokan listings, and activity discovery, but does not specialize in sauna or sauna-culture community features.
• Tabelog (by Kakaku.com): Japan's largest restaurant and lifestyle review platform. Competes indirectly for consumer review/discovery attention; some overlap in onsen/sauna facility reviews, though Tabelog is a horizontal content platform.
• Ikyu (Ikyu.com / 一休.com): Premium Japanese booking platform for hotels, ryokan, and onsen/specialty stays. Directly comparable to Sauna Ikitai's overnight-stay sauna search feature (泊まれるサウナ検索) and competes for high-end wellness travel bookings.
• Rakuten Travel: Japan's leading online travel agency, with which Sauna Ikitai already integrates for overnight-stay sauna bookings. Competes indirectly for spa/wellness/leisure discovery but lacks a purpose-built sauna community or facility database.
• Hot Pepper Beauty (Recruit): Japan's dominant beauty and personal-care booking platform. Comparable to Sauna Ikitai's personal-care/wellness booking positioning but focused on salons/spa rather than sauna facility discovery and community.

Regional players

• HariSpot: Asia-focused discovery platform for hammam and spa/wellness experiences. Comparable category (sauna/spa/thermal discovery) but primarily serves non-Japan markets, making it a regional peer rather than a direct domestic competitor.

Emerging players

• Retty: Japanese word-of-mouth restaurant and shop review platform with strong UGC community. Comparable to Sauna Ikitai's community-driven discovery model but focused on dining rather than wellness facilities.
• Spacom: Japanese day-spa and treatment booking platform. Comparable to Sauna Ikitai's wellness-booking adjacency but focused on beauty/treatment services rather than sauna discovery or community.
• Sento Journal (銭湯ジャーナル): Editorial-led platform covering Japanese public bath (銭湯) culture. Comparable audience and content format to Sauna Ikitai's magazine and サ活 posts but smaller scale and narrower focus on traditional sento.

Direct peers

• Onsen Japan (ONSEN.com): Discovery and review platform dedicated to Japan's hot springs (onsen). Closely comparable to Sauna Ikitai in being a purpose-built vertical for onsen/sauna enthusiasts with reviews and travel content, though it focuses on onsen rather than sauna culture.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/sauna_ikitai
• YouTubeinstagram.com/sauna_ikitai
• Instagraminstagram.com/sauna_ikitai

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 Sauna Ikitai