| Jun Sasaki | |
| Birth Name: | Jun Sasaki |
| Alias: | Yajimax |
| Birth Date: | 1966 7, mf=yes |
| Origin: | Sendai, Miyagi, Japan |
| Occupation: | Singer-songwriter, record producer, disc jockey, remixer, photographer, model |
| Genre: | Folk rock, pop, soul, dance |
| Years Active: | 1987–present |
| Associated Acts: | Misia, Chara, Peace Force, Cosa Nostra |
is a Japanese singer-songwriter and record producer. He is best known for his work as a record producer for acts including Misia, Chara, and Yuki Koyanagi. Sasaki also works as a photographer under the alias of Yajimax. In 2005, Sasaki married musician and actress Kaori Hifumi.