Tenmon

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This article is about a Japanese martial art. For the composer, see Tenmon (composer).

Tenmon (天門 Tenmon?) is the ninja art of understanding and using meteorology as a strategic weapon. It allowed ninja to foresee weather changes and to use them as an advantage. By knowing nature's changes, animal behaviour, or atmospheric signs, one could use rainy weather or a hot sunny period as strategic elements to weaken and defeat the enemy.