The Osaka Evessa mounted a spirited comeback during Saturday's series opener against the visiting SeaHorses Mikawa.
But Evessa coach Dai Oketani's squad fell short in the end, losing 76-69 at Fumin Kyosai Super Arena.
Osaka (2-5) trailed 31-7 after the opening quarter and 46-25 at halftime. A strong third quarter then saw the Evessa cut the lead to 60-55 entering the final stanza.