flag insignia
Refers to a design or emblem on a flag, often used in historical or military contexts. Similar to 旗印 (はたじるし).
See also: 旗印 (はたじるし)
戦国時代の旗章には、家紋がよく使われた。
In the Sengoku period, family crests were often used as flag insignia.
vexillology
Compound of 旗 (flag) and 章 (emblem, badge). The exact historical derivation is uncertain, but the word is conventionally associated with flag insignia.