Tokyo Metropolitan Government Open Data publishes 9,698 open datasets for Japan. Browse them live in Vizzie and turn any one into a map or chart.
Tokyo Metropolitan Government Open Data is the open-data portal for Japan, covering Tokyo. It runs on CKAN, an open catalogue standard used by many national governments. You can browse it directly at catalog.data.metro.tokyo.lg.jp.
On Tokyo Metropolitan Government Open Data, most datasets here are clearly licensed — only a small share are undeclared. It's important to know that "no licence declared" is not the same as public-domain or free-to-use. Undeclared data carries no explicit permission to copy, adapt, or redistribute it — so reusers should treat it cautiously and check with the publisher before relying on it. Vizzie flags each dataset's licence (or its absence) so you can see this before you build.
Of the 9,696 datasets here whose licence Vizzie can identify, essentially all of them can be used commercially; 0% are non-commercial only; 0% forbid derivatives, which rules out remapping them. Attribution is required by almost every open licence — Vizzie writes the attribution line for you when you export or publish.
Most of Tokyo's municipal data arrives as a table keyed by ward — land use by ward, population by ward, facilities by ward — with no geometry attached. Normally that means tracking down boundary files, matching them to your rows, and fixing the codes that do not line up before you can draw anything.
Vizzie already holds the boundaries. All 62 Tokyo municipalities — the 23 special wards plus the 26 cities, 5 towns and 8 villages — are loaded, so a ward-keyed table becomes a map without a join step. Vizzie matches on whichever key your data happens to use:
Boundaries: 「国土数値情報（行政区域データ）」（国土交通省）を加工して作成 — MLIT National Land Numerical Information, administrative areas (Tokyo, 2024).
No download, no GIS specialist. Opens in Vizzie.