Kouzu Cadastral Map

View Japan's official cadastral maps ("Tokibasho Sonaetsuke Chizu", published by the Ministry of Justice) directly on top of Apple Maps.

Overlay on the map
Parcel boundaries are drawn over the map, so you can see which building sits on which parcel. Switch to satellite imagery at any time.

Tap a parcel for everything about it
Lot number, land category, scale, coordinate system, accuracy class and data edition. Long-press to copy any single field. You can go straight to the Ministry of Justice online request service.

Parcels that are not on the map
About 60% of parcels nationwide (and around 99% in central Tokyo and Osaka) use arbitrary coordinate systems and have no latitude or longitude. This app opens those as individual map sheets, so they are still readable.

Keep it with you
Download by prefecture and everything opens offline, in the mountains or out of signal.

Zoom out for the whole country
Prefectures when zoomed out, municipalities when closer. Areas you have downloaded are coloured, so you can see at a glance what you hold.

Please note
Cadastral maps do not determine legal boundaries. Confirming a boundary requires a land survey drawing and an on-site inspection. The data here is processed from public releases and may differ from the current register.

Sources: "Tokibasho Sonaetsuke Chizu Data" (Ministry of Justice), "Location Reference Information" (MLIT), "National Land Numerical Information (Administrative Boundaries)" (MLIT), processed by the developer.