"About 18 months ago, we saw a huge change in Isaac as a basketballer," reflects Breakers Academy coach Judd Flavell. "Suddenly, he was in the gym every day, getting his shots up and working on his game. His body went from being overweight, chubby and a bit slow - he would be dragging his feet up the court - to being athletic and long.
"Now he's probably the nearest thing we've got to another Mika Vukona. We always tell our kids about how many hours you need to put in to make it and there he was, doing it off his own bat."
Fotu remembers the day the light bulb went on: "I just started to believe in myself and realised what I could do. I think that's the problem with New Zealand kids - they don't really have the self confidence like kids in the States, when, really, we are on their level."
Hawaii play in the Western Athletic Conference, not one of the strongest in the United States college system, so Fotu can expect to see significant court time straight away.
"The coaches there are great and I think they will help me improve my game." Fotu attends Rangitoto College and hopes to fit in a National Basketball League season with the Harbour Heat before taking up his scholarship.
"It's been a crazy year. I'm happy with what I've achieved and excited about the future."