Chi Mon Geography

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Chi Mon (地門) is the Ninja discipline of geography. The ninja of medieval Japan would spend many days in classrooms learning the geography of Japan and memorizing its major rivers and their tributaries.

In addition, ninja would learn botany, entomology, geology, and zoology in order to determine their location, based on their natural surroundings.

Other skills include familiarizing themselves with the major imports and exports of surrounding provinces: knowledge which could be used for sabotage.