Map of Tokyo prefecture, Tokyo.
T.Kambayashi, OpenStreetMap <a rel="nofollow" class="external autonumber" href="https://openstreetmap.org">[3]</a>
CC BY-SA 3.0
OpenStreetMap <a rel="nofollow" class="external autonumber" href="https://openstreetmap.org">[1]</a>,Ministry of the Environment Government of Japan<a rel="nofollow" class="external autonumber" href="http://www.env.go.jp/en/">[2]</a>,