The Nippon Foundation of Tokyo, Japan, is a private, non-profit grant-making organization. It was established in 1962 by Ryoichi Sasakawa. The foundation's mission is to direct Japanese motorboat racing revenue into philanthropic activities, it uses this money to pursue global maritime development and assistance for humanitarian work, both at home and abroad. In the humanitarian field, it focuses on such fields as social welfare, public health, and education. The foundation has also been criticized for promoting Japanese historical revisionism, particularly in whitewashing Japanese war crimes committed in World War II.

Ryōichi Sasakawa was a Japanese suspected war criminal, businessman, far-right politician, and philanthropist. He was born in Minoh, Osaka. In the 1930s and during the Second World War he was active both in finance and in politics, actively supporting the Japanese war effort including raising his own paramilitary units. He was elected to the Japanese parliament during the war. After Japan's defeat he was imprisoned for a time, accused of war crimes, and then found financial success in various business ventures, including motorboat-racing gambling events (Kyōtei) and ship building. He supported anticommunist activities, including the World Anti-Communist League. In 1951 he helped found the Nippon Foundation and became its first president. The foundation has done charitable work around the world, for which it and Sasakawa have received many official honors.