noun
mounted warrior; cavalier; knight
Refers to a warrior on horseback, especially in historical Japanese settings. The English glosses 'cavalier' and 'knight' are approximate; the term is culturally specific to Japanese mounted warriors.
戦国時代の騎馬武者は、機動力を活かして戦った。
Mounted warriors of the Warring States period fought using their mobility.
博物館で騎馬武者の甲冑を見学
I saw the armor of a mounted warrior at the museum.
Compound of 騎馬 (kiba, 'horseback riding') and 武者 (musha, 'warrior'). The term is straightforward and describes a warrior who fights on horseback.