Between them, the Chiba Jets Funabashi and Tochigi Brex have won a remarkable 85 of 102 regular-season games this season.
What's more, the Jets completed an Emperor's Cup three-peat in January, while the Brex have stayed on their rivals' heels all season long.
The latest chapter of the East Division teams' heated rivalry took place on Saturday afternoon at Funabashi Arena, where the Jets recorded an 95-86 victory.
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