Watch every Tokyo train move on a 3D map, with lines at their real depth underground

Lays out the whole Tokyo rail network from open data and runs trains along it on a clock you can speed up or slow down. You can filter by operator, fly to a station and dive into the few stations modelled inside.

Notes

A sketch, not a timetable: train positions are approximate and the page says so. AI use comes from the maker's HN comment (he asked Claude for the first version), not from the page.