そしたら

conjunction

then; and then; in that case; if so

Casual spoken conjunction used to connect events or to present a consequence or response to what was just said. Similar to そうしたら but more colloquial.

• 駅えきに着ついた。そしたら、友とも達だちがもう待まってた。

  I arrived at the station. Then, my friend was already waiting.

• 「明日あした雨あめかもね」「そしたら、ピクニックは中ちゅう止しだね」

  "It might rain tomorrow." "In that case, the picnic is off."