Archaic term for a red flag, used historically or in classical contexts. In modern Japanese, 赤旗 (あかはた) is the common word.
The ancient document records, 'They advanced raising the red flag.'
Five-starred Red Flag; flag of China
Compound of 紅 (kō, 'crimson, red') and 旗 (ki, 'flag'). The reading is on'yomi, and the word is now archaic.