Brazil’s fourth batter Daniel Matsumoto hit an infield single with the second and third bases occupied to pull one back, before Reinaldo Sato welcomed a runner from the third base by hitting a grounder to the short stop.
In the four-team round robin in Fukuoka, two-time defending champions Japan beat China 5-2 later in the day.
The hosts defeated Brazil 5-3 in their opener on Saturday.
Japan and Cuba — finalists in 2006 — have one win each and Brazil two defeats.