通とおりすがり

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

passing by; just passing through

Refers to the act of passing by a place, often implying a brief, incidental presence. Commonly used in the phrase 通りすがりの人 (a passerby).

• 通とおりすがりの人ひとが助たすけてくれた。

  A passerby helped me.

• 通とおりすがりにその店みせを見みつけた。

  I found the shop while passing by.