Road King: Japan Road Map Quiz

A quiz app for learning Japan's roads on the map. Over 13,000 roads and places, from national routes and expressways to roadside stations and Edo-period highways.

Road King is a map quiz for people who want to learn the roads of Japan: drivers, travelers and geography fans. The app's interface is in Japanese.

National routes and expressways, roadside stations, interchanges, junctions, service and parking areas, Edo-period highways and post towns, even the place names on license plates. Over 13,000 roads and places across Japan appear in 12 quiz categories.

• Solve on the map, remember the location "Which one is Route 1?" Four lines are drawn on the map and you pick by color. After you answer, the route name, its route sign and its start and end points appear on the map, so you can see at a glance where the road runs. Expressways get green shields and old highways get wooden signposts, drawn to match the real signs.

• Around-Japan Quest (12,300 km) A 51-stage course from Wakkanai through Shiretoko, Honshu, Shikoku, Kyushu, Tanegashima, Amami and Okinawa, and back to Wakkanai. Each correct answer moves your journey forward, and the map shows where in Japan you are driving now.

• Rankings and badges Join 9 nationwide rankings, including distance driven, points, weekly points, longest streak, accuracy, answers and laps completed. No account or sign-in needed, and you can change your nickname at any time. 33 achievement badges to collect.

• Review only your mistakes Questions you got wrong are saved automatically, so you can retry them as often as you like.

• What's included National routes, expressways, motorways, prefectural roads, toll roads and street names; roadside stations, interchanges, junctions, service and parking areas; Edo-period highways and post towns (with reading guides); the legal start and end points of national routes; license plate place names and their areas. The number of questions is shown in each quiz.

• One-time purchase All regions, all categories and the search feature are unlocked with a single purchase. There is no subscription. Without it you can still play the national route and start/end point quizzes for Kanto and Kinki, the Around-Japan Quest, rankings and badges, plus up to 5 questions a day in the other categories.

• Sources (c) OpenStreetMap contributors (ODbL 1.0) Edo main highway and post town datasets, ROIS-DS Center for Open Data in the Humanities (CC BY 4.0) Wikipedia Japanese edition (CC BY-SA)