Data and sources

Facility data

Every shop, station, pharmacy and police box on this site comes from OpenStreetMap, © OpenStreetMap contributors, made available under the Open Database License (ODbL). Queries run against public Overpass API instances.

Search

Place search uses Nominatim, also built on OpenStreetMap data.

How the score is built

For each category, every matching place within 800 m counts towards a target. Anything within 150 m counts in full; credit falls off in a straight line to zero at 800 m. Category scores are combined with fixed weights that add up to 100.

Walking times use 80 metres per minute. That is the convention Japanese property listings are required to use; it is not an international standard, which is why the measured distance in metres is always printed next to it.

What is deliberately left out

Flood and landslide hazard zones, road and railway noise, and earthquake and tsunami risk are not part of the score. They are listed on every report as excluded. A category that is missing from the data is never presented as “nothing found there”.

Laundromats are shown but not scored. OpenStreetMap coverage for them varies too much between regions to score fairly — a low count usually means nobody has mapped them, not that they are absent.

Accuracy

Distances are straight-line, not walking routes, so a river or a railway between you and a shop is not accounted for. OpenStreetMap is contributor-maintained and can be out of date. Check anything that matters to your trip before you rely on it.