The Kingdom led 2-1 at half-time and converted an impressive five of seven attempts at goal, with 17-year-old Seini Lutu bagging a hat-trick in the 12-goal thriller at the Sporting High Performance Centre in Nunez.
Tonga, who were beaten by Bolivia in their opening match, are back in action on Thursday local time against group leaders Spain.
Meanwhile, the Solomon Islands men's futsal team were beaten 10-4 by Russia in their latest match, having fought back from a 7-1 half-time deficit.
