JishinCoach
A personalized earthquake-preparedness app for Japanese households that uses the active-fault map under your address to generate a 12-week action plan with concrete tasks, not generic checklists.
Japanese households, especially those with elderly relatives or young children, living in or near S-rank active fault zones
- Address-based fault-risk profile with a plain-language explanation of what's underneath you and how it has behaved historically
- 12-week preparedness roadmap with weekly small tasks (this week: secure the bookshelf; next week: identify the household meeting point)
- Family check-in mode: one-tap 'I'm safe' messages that fan out to relatives after an alert
- Offline mode with cached local hazard maps, evacuation routes, and emergency contacts
NHK's coverage of strain transfer to nearby faults after the Kumamoto event is driving 5,000+ searches, and Japan's earthquake risk profile means this exact worry returns with every new analysis.
NHK and multiple major outlets (KTV, FNN, MSN/毎日) ran prominent S-rank active fault explainers tied to the July 2025 Kumamoto M7.1 event, confirming real topical search interest, though the exact 5,000+ search figure wasn't independently verifiable.活断層による内陸直下地震 どこにあるか地図で 各地の危険度ランクも | Nhkニュース ↗【解説】「Sランク」断層帯とは 今後30年以内の地震発生確率が『3％以上』 熊本で震度7 "危険な断層帯"は各地に ↗
Top Japanese disaster apps (NERV, Yahoo!防災速報, NHK防災, ココダヨ, PREP, クロスゼロ, 全国避難所ガイド) focus on real-time alerts and shelter lookup, not personalized multi-week household action plans keyed to the user's specific fault zone — the 12-week plan positioning appears differentiated.【2026年最新】災害、防災アプリおすすめ12選｜無料で使える厳選アプリを用途別に徹底解説 ↗【2026年】防災アプリおすすめ8選 地震速報や災害情報をリアルタイムで ↗
NERV proved Japanese users will pay subscription fees for disaster apps (¥250/mo E plan, ¥480/mo EE Supporter's Club), but those monetize real-time alerts — willingness to pay ongoing for a household prep plan is plausible but unproven.「特務機関nerv」防災アプリが有料プラン導入 250円と480円の2段階、無料でも利用制限なし ↗特務機関nervアプリ サポーターズクラブのご案内 ↗
Earthquake risk is a permanent structural feature of Japanese life; the government's Earthquake Research Promotion office continuously updates S/A/B/C fault rankings, ensuring recurring relevance tied to each new event or revision.活断層による内陸直下地震 どこにあるか地図で 各地の危険度ランクも | Nhkニュース ↗
Build relies on publicly available government fault map data plus address geocoding and templated 12-week plan generation — technically straightforward but requires reliable Japanese-language content, household profile UX, and integration with local hazard/evacuation data.特務機関NERV防災アプリ ↗