Masayoshi Manabe's fifth-ranked side comfortably collected their second success in three games 25-20 25-19 25-23 in an hour and 19 minutes to kick-off the day at Earls Court.
Yukiko Ebata again led the way with 14 points while Saori Kimura tallied one less to provide the backbone of the Japanese success.
Prisilla Altagracia Rivera Brens scored 16 points, and had two blocks, for the central Americans but it was not enough to prevent them from slipping to a third loss in as many games.
That has made is extremely difficult for Dominican Republic to reach the last eight from Pool A, with two group games left to play.
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