The hosts pulled away over the final 20 minutes in Okinawa, outscoring the Central Asian national squad by 25 points in that span.
A 14-2 run in the first quarter set the tone for Japan, which finished with five double-digit scorers.
The Akatsuki Five edged Taiwan before falling to Australia in Okinawa.
The sophomore guard scored a season-high 23 points, including 5 of 6 from 3-point range, against South Dakota on November 27.
