折おりしも

adverb

at that very moment; just then

Used to emphasize that something happened exactly at a particular time, often coinciding with another event. Typically found in written or formal contexts.

• 折おりしも、外そとで大おおきな雷かみなりが鳴なった。

  Just then, a loud thunderclap sounded outside.

• 折おりしもその日ひは彼かれの誕たん生じょう日びだった。

  As it happened, that day was his birthday.