JishinQuote
A retrofitting-cost estimator for Japanese homeowners that combines the active-fault class near a property with the home's age and structure to produce a realistic, line-item quote request they can send to contractors.
Japanese homeowners considering earthquake retrofitting or seismic upgrades
- Address-input produces a fault-class risk badge plus a recommended retrofit type (wall bracing, foundation work, etc.)
- Itemized cost ranges pulled from regional contractor data, refreshed quarterly
- One-click 'request quotes' that produces a Japanese-language brief contractors can respond to
- Comparison view of two or three contractor quotes side by side with a checklist of what to ask each
Triggers like the Kumamoto-fault coverage drive spikes in homeowner demand for retrofitting, and most homeowners don't know what a fair price looks like until three quotes arrive.
Multiple consumer-facing Japanese sites (リショップナビ, イエナカ, ミツモア, reform-portal) publish cost-ガイド content for 耐震リフォーム, with ienakama alone listing 1,467 firms and 20,886 homeowner reviews — confirms large, recurring search demand; major events (Noto 2024, Kumamoto) keep queries spiking.耐震リフォームの相場費用は？方法から補助金まで徹底解説! | リフォーム比較jp ↗耐震リフォーム・耐震補強工事の業者/会社を口コミ・価格で探す ↗
The retrofit-quote comparison space is crowded: リショップナビ, ミツモア, リフォームガイド, イエナカ, reform-soudan, refonavi and ouchimatch all already match homeowners to contractors by location/age; the active-fault-class input is the genuinely novel angle but competes with government (MLIT) tools.【国土交通省】耐震改修の専門家の選び方｜住まいの耐震化 ↗耐震リフォームおすすめ業者【費用・口コミで比較】 - ミツモア ↗
Lead-gen to contractors is the proven model (yen per qualified lead), and average ticket size is large (¥100–300万/¥120–160万 central), but Japanese consumers strongly expect free estimates — charging the homeowner for the estimator itself is a hard sell.耐震リフォームの相場費用は？方法から補助金まで徹底解説! | リフォーム比較jp ↗耐震補強（耐震リフォーム）にかかる費用は？事例や補助金も徹底解説 ↗
Aging Japanese housing stock keeps retrofit demand structurally high for decades
Active-fault and seismic-hazard data are public (AIST GSJ, GSI, J-SHIS) and address-based lookup is standard; line-item retrofit cost ranges are well-documented. Main risk is the contractor-side cold start and the need to keep fault/price tables current, but a homeowner-facing estimator MVP is straightforward.AIST:Active fault database of Japan - GSJ ↗Active Fault Map | GSI HOME PAGE ↗