List of Famous people who are 73

Jinichi Kawakami (川上仁一) b. 1949, head of Banke Shinobinoden, claims to be the second last sōke and only heir to authentic ninjutsu. He says he is the 21st head of the Koga Ban family, a mercenary, and the honorary director of the Iga-ryu Ninja Museum. In 2011, he was specially appointed a professor at Mie University to research ninjutsu at the university's research cooperation center.

Sun-Yung Alice Chang is a Taiwanese American mathematician specializing in aspects of mathematical analysis ranging from harmonic analysis and partial differential equations to differential geometry. She is the Eugene Higgins Professor of Mathematics at Princeton University.

Joaquim Furtado is a Portuguese journalist, reporter, television anchor and documentary film director. He worked during almost all his entire career for state-run RTP television network, including in RTP 2 for many years.

Marco Tronchetti Provera is an Italian businessman. Chief Executive Officer of Pirelli & C. S.p.A. since 1992 and Executive Vice Chairman since 20 October 2015 and Chairman of Marco Tronchetti Provera & C. S.p.A., a holding which he controls and which indirectly holds 50% of Camfin S.p.A.. Camfin, indirectly, holds 41% of Marco Polo Industrial Holding S.p.A., the major shareholder who controls Pirelli & C. S.p.A. Pirelli was sold to ChemChina, a state-owned Chinese company in 2015, however, Tronchetti Provera was retained.

Spider Robinson is an American-born Canadian science fiction author. He has won a number of awards for his hard science fiction and humorous stories, including the Hugo Award 1977 and 1983, and another Hugo with his co-author and wife Jeanne Robinson in 1978.