Moi told the Warrior Beat he made the oral commitment yesterday.
Moi said he is 6 feet 4 and 240 pounds.
He said he will play his sophomore season at RCC in 2014, earn an associate degree in December, and join the Warriors for the 2015 spring semester. After that, he will have three years to play two seasons.
"I grew up watching Hawaii," Moi said. "I always wanted to play for them. I've always been a Hawaii fan."
Moi said his father was raised in Hawaii. He said he visits the islands about once a year.
"I like everything about Hawaii," said Moi, who also has been recruited by BYU and Washington State.
Moi, who was raised in Redlands, Calif., was 5-11 during his junior year at Citrus Valley High. The ensuing summer, he grew four inches.
"I'm officially 6-4 now," Moi said.
Moi also said he has played rugby for five years, beginning during his freshman year at Citrus Valley.
Moi said UH assistant coach Lewis Powell was the point recruiter.
Click on the link for his highlights: Moi videos