Jak made his debut in The Precursor Legacy at fifteen years old, with his most recent known age at nineteen in Jak X: Combat Racing. He is the son of Damas, born to the House of Mar in Haven City, but raised by Samos Hagai in Sandover Village along with his sidekick Daxter until his mid teenage years
During the main series—from Jak II to Jak X: Combat Racing—Jak was voiced by Mike Erwin. However, during the sixth INSTALLMENT,The Lost Frontier, he was voiced by Josh Keaton. Jak did not speak during The Precursor Legacy, though vocal sounds were provided by an uncredited Aaron Lohr.
- Jak meets Sonic in Sonic the Hedgehog meets Jak and Daxter: The Precursor Legacy. He will later join him in Sonic Storm Adventures of Kingdom Hearts 3.
- Jak will begin his adventure in Jak and Daxter meets The Great Mouse Detective.
- In Sonic Storm Adventures of Kill la Kill, he will suddenly fall in love with Ryuko Matoi, but he will soon get over it at the end of the series because he can't hurt Keira's feelings, but he might still have those feelings for Ryuko someday in the future.