7 Map of Shikotsu, Toya and vicinity, Japan

1956

Nihon Shoin

1:250k

Lake Tôya

1940

1:50k

8 Map of Hokkaido 1, Japan

1956

Nihon Shoin

1:500k

Hokkaido. September 2016

2016

Zero Per Zero

Prolivy laperuza i tsugaru severnyye porty yaponii

1974

Glavnoe Upravlenie Navigat︠s︡ii i Okeanografii Ministerstva Oborony SSSR.

1:1m

Geological map of the Japanese Empire 1:1 000 000

1902

Tokyo : G. Yoshii

11 Map of Hokkaido 2, Japan

1956

Nihon Shoin

1:1m

Hokkaido railway system. September 2016

2016

Zero Per Zero

6 Map of Hokkaido, Japan

1956

Nihon Shoin

1:2m

Japan - North. Tokyo Bay. Pergamon World Atlas.

1967

Polish Army Topography Service

1:3m