Tenmon

{{Short description|Ninja meteorological art}}

{{One source|date=December 2021}}{{About|a Japanese martial art|the composer|Tenmon (composer)|the period|Tenbun}}

{{Nihongo|Tenmon|天門|Tenmon}} is the ninja art of understanding and using meteorology as a strategic weapon.{{cite web |url=http://bujinkan.bespin.org/Ryu/TenmonChimon_TheGyokkoRyuChart.pdf |title=Tenmon Chimon |last=Hisamune |first=Hatsumi |access-date=April 7, 2017}} It allowed ninja to foresee weather changes and to use them as an advantage. By knowing nature's changes, animal behaviour, or atmospheric/astronomic signs, one could use rainy weather or a hot sunny period as strategic elements to weaken and defeat the enemy.https://mai-ko.com/travel/japanese-history/museum-notes/the-18-major-ninja-training-techniques-spiritual-training-seishin-teki-kyoyo/