先せん週しゅう

noun, adverb

last week; the week before

Refers to the week immediately preceding the current one. Can be used as a noun or adverbially without a particle.

• 先せん週しゅう、新あたらしいカフェに行いきました。

  I went to a new café last week.

• 先せん週しゅうの金きん曜よう日びは休やすみでした。

  Last Friday was a day off.