also: せっき
noun
A literal red-colored flag, often used as a warning signal or symbol of revolution.
工事現場で赤旗が振られていた。
A red flag was being waved at the construction site.
noun
Proper noun: the official newspaper of the Japanese Communist Party.
彼は毎朝、赤旗を読んでいる。
He reads the Red Flag every morning.