KanjiJLPT N4
Yesterday

yesterday, previous

Mnemonic

A saw left out in the sun tells the story of yesterday. Its teeth still clogged with sawdust, warm from the sun—evidence of work done just one day ago. Pick up the saw tomorrow and yesterday's sun-warmed handle still remembers.
Additional thoughts
Picture a well-used saw resting on a sunlit workbench. The warmth and sawdust are still fresh—yesterday is close, tangible, not yet faded. Sun (日) + Saw (乍) = Yesterday (昨).
Quick recall
A saw warm from the sun tells yesterday's story.

Details

The keyword for 昨 is yesterday. This kanji refers to the day before today, conveying the concept of the immediate past. It is used to indicate something that occurred one day prior to the present, and by extension, it can also suggest the recent past in a broader sense, as in "last" (last year, last night). The character carries a sense of time that has just passed and is still close to the present moment.
On'yomi
さく