その日ひその日ひそのひそのひMeanings1expressioneach day; day-to-day; from day to dayEmphasizes living or dealing with things on a daily basis without long-term planning; often used in expressions like その日その日を生きる (live day by day).彼かれはその日ひその日ひを精せい一いっ杯ぱい生いき