noun
two flags
Refers to a pair of flags, often in a ceremonial or decorative context.
神社の入り口に旗二流が立てられていた。
Two flags were set up at the entrance of the shrine.
Compound of 旗 (hata, 'flag') + 二 (ni, 'two') + 流 (ryū, counter for flags). The exact historical derivation is uncertain.