Japan's building data, connected.
Find a building, trace its sources, and use its data. A growing public database with permanent IDs and free access for people, applications, and agents.
API + MCP
Build with this data
Free public access. No API key. Read records in your app or connect an agent.
Browse by location
All Japan東京都
文京区
Choose a machi-aza
- Buildings indexed
- 74,658
- Neighborhoods mapped
- 213
- Values with a cited source
- 100%
- Last data release
- Sep 26, 2026
Explore the register
Bunkyo · 522 assets in view
Live areas
11 machi-aza mapped, 1695 buildings on record.
21 machi-aza mapped, 11667 buildings on record.
5 machi-aza mapped, 522 buildings on record.
12 machi-aza mapped, 388 buildings on record.
12 machi-aza mapped, 697 buildings on record.
3 machi-aza mapped, 254 buildings on record.
2 machi-aza mapped, 365 buildings on record.
10 machi-aza mapped, 5605 buildings on record.
16 machi-aza mapped, 5500 buildings on record.
4 machi-aza mapped, 1776 buildings on record.
7 machi-aza mapped, 2940 buildings on record.
31 machi-aza mapped, 11515 buildings on record.
26 machi-aza mapped, 18700 buildings on record.
24 machi-aza mapped, 6582 buildings on record.
29 machi-aza mapped, 6452 buildings on record.