Natural Resources Section GHQ SCAP ; Source: Survey of coal reserves 1929-1931, excluding low-grade lignite, published 23 March 1932 by the Ministry of Commerce and Industry (Mining Bureau). Hachure relief. Hokkaido coal reserves table, coal classification legend, index of principal coal mines. Includes important cities, railways. "The present total reserves are considered to be approximately the sasme as those based on 1929-1931 survey because coal mined since 1931 is balanced by the development of new reserves."
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Supreme Commander for the Allied Powers, Natural Resources Section.
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