--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Yunokuni - HotSpring and Sauna" developer_entity: "Katsuhito Matsushima" bundle_id: "com.dara9.Yunokuni" app_store_id: "1322528456" category: "Travel" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2021-12-03" report_date: "2026-08-14" last_verified: "2026-08-14T00:00:00.000Z" report_version: "2.0.1" total_reviews: 3 overall_rating: 1 confidence: "low" confidence_score: 0.05 data_age_days: 2 momentum_velocity: "zombie" intelligence_version: 3 tags: ["travel", "free", "mobile app", "app review", "app analysis", "travelers", "local", "residents"] canonical_url: "https://marlvel.ai/apps/yunokuni-hotspring-and-sauna" license: "CC-BY-NC 4.0" content_version: "v2" --- # Yunokuni - HotSpring and Sauna Intelligence Report ## TL;DR {#tldr} - **Category**: Travel · Free - **Signal**: Rating 1 > **TL;DR:** Yunokuni - HotSpring and Sauna is a travel app by Katsuhito Matsushima, rated 1/5 by 3 users, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Yunokuni - HotSpring and Sauna is a travel app by Katsuhito Matsushima. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 1/5 (3 reviews) | | **Category** | Travel | | **Developer** | Katsuhito Matsushima | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.05/1.0) | | **Data Age** | 2d | ## Metadata & Market Performance - **Publisher:** Katsuhito Matsushima - **Category:** Travel - **Target Audience:** Travelers and local residents in Japan seeking specific hot spring or sauna amenities. - **Platforms:** iOS - **Version Reviewed:** 2.0.1 - **Report Date:** 2026-08-14 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.05/1.0) - **App Store ID (iOS):** 1322528456 - **Bundle ID:** com.dara9.Yunokuni - **Performance Trend:** Declining - **Data Window:** Analysis based on signals collected up to 2026-08-14 ## Executive Snapshot **What it is:** Yunokuni is a specialized search utility for hot springs and saunas in Japan, allowing users to filter by specific amenities on iOS. **Why users hire it:** The app removes the cognitive friction of searching for specific bath types in general maps, though the current lack of maintenance limits its utility. ## App DNA (Features & Intent) - **[Differentiator] Detailed Facility Filtering:** Narrows search results by specific amenities including open-air baths, water baths, and shampoo availability. * *User Intent:* Users want to quickly find relevant content or features. - **[Differentiator] Real-time Status Indicators:** Displays facility availability via color-coded map pins. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. - **[Standard] Cloud Sync:** Synchronizes favorite facility lists for restoration across device changes. * *User Intent:* Users expect seamless access across multiple devices. ## Market Position {#market-position} Yunokuni holds a 1-star rating across its total user base, with no updates in 1,715 days. This lack of momentum positions it as a legacy utility that has been superseded by general-purpose mapping services. ## Monetization Strategy - **Model:** Free - **Tiers:** Free to use - **Analysis:** Yunokuni operates as a free utility without explicit subscription or IAP gates. ## SWOT Analysis {#swot} **Core Strengths:** - Granular filtering for specific bath amenities **Growth Levers:** - Pivot to community-driven data verification ## Recent Changes (v2 → v3) {#recent-changes} The product has moved from a passive maintenance state to an active sunsetting recommendation, driven by a four-year development gap and a 1-star rating. **Overall trend**: Declining **Compared at**: 2026-08-14 ### High-impact changes - **[Shifted] Sunset recommendation** (positioning) ### Medium-impact changes - **[Added] Rating as a weakness** (swot) - **[Shifted] Explicit competitor comparison** (positioning) ## What's New - **Latest (v2.0.1, 4 years ago):** Resolved layout display issues for iOS 14 devices. ## App Momentum (Zombie) {#momentum} - No feature updates for four years. - Maintenance-only status since late 2021. > **Cadence:** 1 total versions · 0 majors in last 6 months · 1714 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Yunokuni - HotSpring and Sauna is a travel app that is completely free. It holds a 1/5 rating from 3 reviews. > **Bottom Line:** Yunokuni is effectively a sunset product, as the four-year development gap makes it impossible to compete with the real-time data accuracy of modern mapping platforms. **Best for:** Travelers and local residents in Japan seeking specific hot spring or sauna amenities. ### PM Action Plan (Next Best Moves) - [ ] [SUNSET] Sunset the application because the four-year maintenance gap renders the data utility unreliable → eliminate brand drag ### Outlook: Declining The market for niche location utilities is consolidating around platforms that provide real-time data and frequent updates. Yunokuni's failure to maintain its data integrity means it will continue to lose relevance to general-purpose mapping services. - 🔴 The four-year update gap indicates the developer has abandoned the product, leading to inevitable data decay and user churn. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 1/5 | | Total Reviews | 3 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Declining | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Yunokuni - HotSpring and Sauna** (this app) | 1/5 | N/A | Katsuhito Matsushima | | [กิจวัตรมุสลิมไทย](https://marlvel.ai/apps/th-co-mtel-muslimdailythai) | N/A/5 | N/A | Mudarmeen Munlin | | [108 Divyadesam Navigator](https://marlvel.ai/apps/com-rsunda12-divyadesams) | N/A/5 | N/A | Rajagopal Sundarrajan | | [1Call Taxi](https://marlvel.ai/apps/1call-taxi) | 5.0/5 | N/A | Ardalan Hussein | | [1st Central Connect](https://marlvel.ai/apps/1st-central-connect) | 3.0/5 | N/A | Cambridge Mobile Telematics Inc. | | [24Seven Taxi Driver](https://marlvel.ai/apps/24seven-taxi-driver) | 5.0/5 | N/A | 24Seven Taxi Dispatch, LLC | ## Company Profile - **Developer:** Katsuhito Matsushima ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/yunokuni-hotspring-and-sauna/id1322528456?uo=4) - **Sources:** App store metadata. ## Related Intel Reports - [*กิจวัตรมุสลิมไทย*](https://marlvel.ai/apps/th-co-mtel-muslimdailythai) (Mudarmeen Munlin) · N/A Rating - [*108 Divyadesam Navigator*](https://marlvel.ai/apps/com-rsunda12-divyadesams) (Rajagopal Sundarrajan) · N/A Rating - [*1Call Taxi*](https://marlvel.ai/apps/1call-taxi) (Ardalan Hussein) · 5.0/5 Rating - [*1st Central Connect*](https://marlvel.ai/apps/1st-central-connect) (Cambridge Mobile Telematics Inc.) · 3.0/5 Rating - [*24Seven Taxi Driver*](https://marlvel.ai/apps/24seven-taxi-driver) (24Seven Taxi Dispatch, LLC) · 5.0/5 Rating - [*2 one day trips Tokyo suburbs*](https://marlvel.ai/apps/2-one-day-trips-tokyo-suburbs) (mlet co.,ltd) · N/A Rating - [*360 Central Park AR NYC Map*](https://marlvel.ai/apps/com-vues-360centralpark) (Vadym Ustymenko) · N/A Rating - [*360 LA Los Angeles AR Map*](https://marlvel.ai/apps/360-la-los-angeles-ar-map) (Vadym Ustymenko) · 5.0/5 Rating - [*360 NYC: New York City AR Map*](https://marlvel.ai/apps/com-vues-360nyc) (Vadym Ustymenko) · 4.0/5 Rating - [*360 Tampa Bay AR Map*](https://marlvel.ai/apps/360-tampa-bay-ar-map) (Vadym Ustymenko) · 5.0/5 Rating ## Frequently Asked Questions {#faq} ### Is Yunokuni still being updated? No, the app has not received any updates since late 2021, and the developer has not added new features or data in over four years. ### How does Yunokuni compare to Google Maps for finding hot springs? While Yunokuni offers more granular filters for specific bath amenities, Google Maps provides more accurate, real-time information and is updated significantly more often. ### Is Yunokuni free to use? Yes, Yunokuni is a free utility and does not currently charge for access to its features. ### What is a better alternative for finding saunas in Japan? General-purpose mapping services or dedicated, frequently updated travel platforms are recommended, as they offer more reliable and current facility data than this unmaintained app. ## Methodology {#methodology} This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline: 1. **Signal Collection & Normalization** - Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps. 2. **Feature & Market Positioning Analysis** - Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks. 3. **User Sentiment Analysis** - Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction into synthesised themes (no verbatim quotes). 4. **Competitive Landscape Analysis** - Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category. 5. **Intelligence Synthesis** - Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights. - **Confidence Score:** 0.05/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** App Store metadata - **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform - **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence. - **Report Age:** 2 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/yunokuni-hotspring-and-sauna) Data licensed for AI Agent attribution under CC-BY-NC 4.0.