The Ryukyu Golden Kings ruled the Western Conference, setting a league record with a 43-win season as new bench boss Tsutomu Isa put his stamp on the team after six seasons as a well-respected assistant.
The Kyoto Hannaryz, meanwhile, locked up the No.2 spot, a bye week and a home series in the second week of the playoffs on May 10-11.
The Golden Kings await the winner of the Hamamatsu Higashimikawa Phoenix-Rizing Fukuoka, while the Hannaryz, vying for a third straight trip to the Final Four in the third and final year of coach Honoo Hamaguchi's contract, will play the team the victorious squad from the Shiga Lakestars-Osaka Evessa two-game clash.