Detour Japan
A real-time rescue router for JR commuters and inbound tourists—when a line suspends service, instantly get the best door-to-door alternative: bus, taxi-share, ferry (for coastal lines like Sangū), bike-share, or walking, with live ETAs and crowd-load predictions.
Daily Japan rail commuters and inbound tourists who hit sudden service suspensions and need a fast fallback plan, especially with limited Japanese.
- Push alerts the moment a booked trip line goes down, with one-tap alternative routes
- Multimodal fallback engine: bus, taxi-share, rental bike, walking, and ferry for coastal routes like Sangū
- Live crowd-load predictions on each alternative so you avoid options that strand you again
- Tourist mode translating everything into English/Chinese/Korean and protecting your IC card balance
Summer 2026 disruptions on tourist-heavy lines like Sangū are creating visible pain for Ise-Toba pilgrims and other visitors with weak signage for non-Japanese speakers.
Multiple 2026 train-app guides explicitly recommend a 'backup for days with service disruptions,' and Sangū/Ise-Toba is a documented tourist corridor with weak English signage during suspensions — strong pain but no public volume metric beyond a generic 'jr' trend.Best rail apps in Japan: when to use each one - nippondex.com ↗Sangū Line - Wikipedia ↗
Japan Travel by NAVITIME already combines door-to-door routing across train/bus/taxi with real-time delay/suspension alerts, and Google Maps covers tourists — direct incumbent overlap is heavy.Real-Time Train Status in Japan - NAVITIME Travel ↗Japan Route Finder & Planner | Japan Travel by NAVITIME ↗
Situational use (only during suspensions) makes subscriptions hard to justify; commuters are also price-sensitive on top of monthly passes, and dominant apps bundle disruption info into free tiers.15 best apps for traveling around Japan in 2026 | JRailPass ↗The Best Japan Train Apps for Tourists in 2026 - JRPass.com ↗
Japan's high typhoon/earthquake/seismic risk plus chronic JR suspensions (especially on rural tourist lines like Sangū) make this a durable, recurring need year after year.Kintetsu Ise-Shima Train Status: Yamada, Toba & Shima Lines Suspended ↗
Aggregating live APIs across JR, municipal buses, ferries, taxi, and bike-share — plus crowd-load predictions — is a heavy engineering lift against NAVITIME's 20+ years of multimodal coverage.Japan Route Finder & Planner | Japan Travel by NAVITIME ↗