さ - Filler

さ is a casual filler particle used in spoken Japanese to draw attention, soften a statement, or invite a response. It often appears at the end of a clause or after a short phrase. It can convey a laid-back, informal tone and is common in conversation among friends or peers. It can also give a speaker a moment to think or steer the listener toward the next point. Note that because of its casual nuance, さ is less appropriate in formal contexts. Examples below illustrate how it functions in everyday talk.