Observed arrival · 2026-11-14
A 3D map of Japan’s national roads and terrain
An interactive map lets visitors tilt Japan’s terrain and explore how national roads, highways, and prefectural borders cross it.
- For
- Readers tracing Japanese roads across terrain
- Worth noticing
- The page warns that road numbers are assigned automatically from Geospatial Information Authority sign data and may be wrong.
Field notes
The map uses elevation tiles from the Geospatial Information Authority of Japan and road, administrative-boundary, and length data attributed to national government sources. Its accompanying readings compare total and actual route lengths, note 24 national roads with sea sections, and explain that the boundary line at Mount Fuji’s summit is provisional in the source data. The page also cautions that road numbers are assigned automatically from map signs and can be inaccurate.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue