九ここの日かここのか○Common wordJLPTN5Meanings1noun9th day of the monthUsed for the ninth day of any month in dates.会かい議ぎは来らい月げつの九ここの日かです。The meeting is on the 9th of next month.2nounnine daysRefers to a period or duration of nine days.九ここの日か間かんの旅りょ行こうを計けい画かくしています。I'm planning a nine-day trip.