| Mario Alberto Ishii | |
| Office: | Mayor of José C. Paz |
| Term Start: | 10 December 2015 |
| Predecessor: | Carlos Urquiaga |
| Term Start1: | 10 December 1999 |
| Term End1: | 10 December 2013 |
| Predecessor1: | Rubén Oscar Glaria |
| Successor1: | Carlos Urquiaga |
| Office2: | Provincial Senator of Buenos Aires |
| Term Start2: | 10 December 2013 |
| Term End2: | 10 December 2015 |
| Constituency2: | First Electoral Section |
| Birth Date: | June 22, 1951 |
| Birth Place: | Buenos Aires, Argentina |
| Party: | Justicialist Party |
Mario Alberto Ishii (born 22 June 1951) is an Argentine politician of the Justicialist Party, currently serving as intendente (mayor) of José C. Paz, a partido in the Greater Buenos Aires metropolitan area. He is popularly known as El Japonés ("the Japanese") due to his Japanese heritage.[1]
He was first elected mayor in 1999, and continued to be so until 2013, when he was elected to the as Buenos Aires Province Senate.[2] In 2015, he was once again elected mayor.[3]
In August 2020 a video was leaked, showing him accusing city workers of selling drugs in municipal ambulances and saying he had to cover for them, causing major national media attention and a legal case to be opened.[4] He then claimed that when he said "drugs" he had meant "medicines".[5]