NISA, which stands for Nippon Individual Savings Account, is a tax-efficient investment scheme introduced in Japan in 2014. It aims to encourage individuals to save and invest in various financial products such as stocks, bonds, and investment trusts. Unlike traditional investment accounts, NISA offers tax advantages, allowing investors to accumulate tax-free gains up to a certain limit. The scheme is open to Japanese residents aged 20 or above, and they can contribute up to a specified annual amount. NISA has gained popularity as it provides investors with an opportunity to grow their wealth while enjoying tax benefits, contributing to the overall development of the Japanese financial market.