Personal
- Parents are Julie Ann Aspinall Boon and Heemi Kaka
- Started playing football when his family moved from New Zeland to Hawaii during high school because there was no rugby
Before BYU
- Played as a freshman in 2011 for New Mexico State prior to serving an LDS mission
- Started 11 games in 12 appearances for the Aggies while totaling 15 receptions for 122 yards, including one catch for eight yards in a start against BYU in LaVell Edwards Stadium
- A native of Aotearoa, New Zealand, Kaka later lived on the Australian Gold Coast before moving to Hawaii where he attended Kahuku High School
- Played both defensive line and tight end at Kahuku