noun
banner emblem; flag insignia; design on a banner
Refers to the actual symbol, crest, or design displayed on a flag or banner, often in historical or military contexts.
戦国武将はそれぞれ独自の旗印を掲げていた。
Each Sengoku warlord displayed their own banner emblem.
この旗印は家紋
This flag insignia was designed based on the family crest.
noun
slogan; cause; banner (figurative)
Figurative use: a guiding principle, slogan, or cause that a group rallies behind, like a political or social banner.
彼らは「改革」を旗印に掲げて選挙に臨んだ。
They went into the election under the banner of 'reform'.
環境保護を旗印とする団体が増えている。
More and more organizations are adopting environmental protection as their cause.