The Kawasaki Brave Thunders jumped out to a big lead in the second and third quarters, then held off the pesky Chiba Jets Funabashi down the stretch on Friday.
The Brave Thunders recorded an 87-80 victory over their East Division rival at Todoroki Arena.
Chiba, which forced nine fourth-quarter turnovers in the series opener, outscored the hosts 31-12 in the final stanza.