ＮＩＳＡニーサFreq.FrequencyTop 50,000Meanings1nounNISA; Nippon Individual Savings Accountfinance›A tax-exempt investment account system in Japan. The acronym stands for Nippon Individual Savings Account. Used in finance and personal investing contexts.See also: 少額投資非課税制度今年ことしからＮＩＳＡで投資にーさでとうしを始はじめました。
