noun, noun which may take the genitive case particle 'no'
on horseback; riding a horse
Refers to being mounted on a horse, often used in historical or formal contexts. Can also modify nouns with の.
The warrior on horseback drew his bow.
馬上から見る景色は格別だ。
The view from horseback is exceptional.
Compound of 馬 (horse) and 上 (on, above), literally 'on a horse'.