鞍あん上じょう

noun, noun which may take the genitive case particle 'no'

on horseback; on top of a saddle

Refers to being mounted on a horse or the top of a saddle. Often used in literary or descriptive contexts.

• 鞍あん上じょうの人ひとからは、遠とおくの山やま々やまがよく見みえた。

  From on horseback, the distant mountains were clearly visible.