The Yokohama B-Corsairs built a large lead early in Sunday's game and remained in the driver's seat from start to finish.
Meanwhile, a much-improved performance by the Rizing Zephyr Fukuoka in the fourth quarter was not enough to overcome a slow start in an 85-73 defeat at Yokohama International Swimming Pool.
In the series finale between two squads seeking to establish themselves as more consistent, better all-around teams, Yokohama's Masashi Hosoya had a team-high 23 points. He made five 3-pointers in the opening half to help the B-Corsairs (4-13) expand their advantage to 48-29 by intermission.