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Dam Card Distribution Information is a Japanese guide for people collecting dam cards and planning visits to dams across the country. The site compiles information on official and unofficial card distribution points, including locations and opening hours, and provides map codes to make destinations easier to enter into a car navigation system. Its regional listings cover Hokkaido, Tohoku, Kanto, Hokuriku, Chubu, Kinki, Chugoku, Shikoku, and Kyushu/Okinawa, with maps to help visitors explore distribution locations nationwide.

The site also explains how to read dam cards, outlines the distinction between official cards listed by Japan’s Ministry of Land, Infrastructure, Transport and Tourism and other cards, and offers practical advice on storing a collection. Related resources include maps and information for manhole cards, public distribution cards, and fire-service cards. The site notes that distribution details may change and are not guaranteed, so visitors should check current arrangements and observe appropriate visiting hours.

Information is drawn from government agencies, municipalities, organizations, and visitor contributions