昨さく週しゅうさくしゅうMeanings1nounlast weekA straightforward noun meaning the previous week. Less common than 先週 (せんしゅう), but still used in some contexts.昨さく週しゅうの会かい議ぎで決きまったことを確かく認にんしてください。Please confirm what was decided at last week's meeting.昨さく週しゅうはとても忙いそがしかった。Last week was very busy.