Year-by-year team involvement

Here's a look at the league's season-by-season growth:

2005-06
Teams: Niigata Albirex BB*, Oita HeatDevils, Osaka Evessa, Saitama Broncos*, Sendai 89ers and Tokyo Apache.
Facts: 40-game regular season for each team ... champion: Osaka Evessa ... runnerup: Niigata Albirex BB.
*-charters members that defected from the JBL.

2006-07
Teams: Niigata Albirex BB, Oita HeatDevils, Osaka Evessa, Saitama Broncos, Sendai 89ers, Takamatsu Five Arrows*, Tokyo Apache and Toyama Grouses*.
Facts: 40-game regular season ... champion: Osaka Evessa ... runnerup: Takamatsu Five Arrows.
*-expansion teams

2007-08
Teams: Niigata Albirex BB, Oita HeatDevils, Osaka Evessa, Rizing Fukuoka*, Ryukyu Golden Kings*, Saitama Broncos, Sendai 89ers, Takamatsu Five Arrows, Tokyo Apache and Toyama Grouses.
Facts: 44-game regular season ... champion: Osaka Evessa ... runnerup: Tokyo Apache.
*-expansion teams

2008-09
Teams: Hamamatsu Higashimikawa Phoenix*, Niigata Albirex BB, Oita HeatDevils, Osaka Evessa, Rizing Fukuoka, Ryukyu Golden Kings, Saitama Broncos, Sendai 89ers, Shiga Lakestars*, Takamatsu Five Arrows, Tokyo Apache and Toyama Grouses.
Facts: 52-game regular season ... champion: Ryukyu Golden Kings ... runnerup: Tokyo Apache ... the Oita HeatDevils, a playoff contender in previous seasons, went 8-44.
*-expansion teams; Hamamatsu, however, which was previously called OSG Phoenix, defected from the JBL.

2009-10
Teams: Hamamatsu Higashimikawa Phoenix, Kyoto Hannaryz*, Niigata Albirex BB, Oita HeatDevils, Osaka Evessa, Rizing Fukuoka, Ryukyu Golden Kings, Saitama Broncos, Sendai 89ers, Shiga Lakestars, Takamatsu Five Arrows, Tokyo Apache and Toyama Grouses.
Facts: 52-game regular season ... champion: Hamamatsu Higashimikawa Phoenix ... runnerup: Osaka Evessa ... Guard Mahmoud Abdul-Rauf, the highest-profile foreigner player in league history (No. 3 overall pick in the 1990 NBA Draft, plays his first of two seasons for Kyoto.
*-expansion team

2010-11
Teams: Akita Northern Happinets*, Hamamatsu Higashimikawa Phoenix, Kyoto Hannaryz, Miyazaki Shining Suns*, Niigata Albirex BB, Oita HeatDevils, Osaka Evessa, Rizing Fukuoka, Ryukyu Golden Kings, Saitama Broncos, Sendai 89ers, Shiga Lakestars, Shimane Susanoo Magic*, Takamatsu Five Arrows, Tokyo Apache and Toyama Grouses.
Facts: 52-game regular season ... champion: Hamamatsu Higashimikawa Phoenix ... runnerup: Ryukyu Golden Kings ... the Saitama Broncos, Sendai 89ers and Tokyo Apache play their final games of the season prior to the Great East Japan Earthquake on March 11.
*-expansion teams

2011-12
Teams: Akita Northern Happinets, Chiba Jets*, Hamamatsu Higashimikawa Phoenix, Iwate Big Bulls*, Kyoto Hannaryz, Miyazaki Shining Suns, Niigata Albirex BB, Oita HeatDevils, Osaka Evessa, Rizing Fukuoka, Ryukyu Golden Kings, Saitama Broncos, Sendai 89ers, Shiga Lakestars, Shimane Susanoo Magic, Shinshu Brave Warriors*, Takamatsu Five Arrows, Toyama Grouses and Yokohama B-Corsairs*.
Note: The Tokyo Apache suspended operations in early June, citing financial problems as the reason to pull out of the league.
*-expansion teams

2012-13
Teams: Akita Northern Happinets, Chiba Jets&, Gunma Crane Thunders*, Hamamatsu Higashimikawa Phoenix, Iwate Big Bulls, Kyoto Hannaryz, Miyazaki Shining Suns, Niigata Albirex BB, Oita HeatDevils, Osaka Evessa, Rizing Fukuoka, Ryukyu Golden Kings, Saitama Broncos, Sendai 89ers, Shiga Lakestars, Shimane Susanoo Magic, Shinshu Brave Warriors, Takamatsu Five Arrows, Tokyo Cinq Reves*, Toyama Grouses and Yokohama B-Corsairs. 
Notes: &-The Chiba Jets defected to the rival NBL (relaunched JBL) after the season. The Miyazaki Shining Suns folded after the season.
*-expansion teams

2013-14
Teams: Akita Northern Happinets, Aomori Wat's*, Bambitious Nara*, Gunma Crane Thunders, Hamamatsu Higashimikawa Phoenix, Iwate Big Bulls, Kyoto Hannaryz, Niigata Albirex BB, Oita HeatDevils, Osaka Evessa, Rizing Fukuoka, Ryukyu Golden Kings, Saitama Broncos, Sendai 89ers, Shiga Lakestars, Shimane Susanoo Magic, Shinshu Brave Warriors, Takamatsu Five Arrows, Tokyo Cinq Reves, Toyama Grouses and Yokohama B-Corsairs.
Notes: Ryukyu defeated Akita in the title match.  
*-expansion teams

2014-15
Teams: 
Teams: Akita Northern Happinets, Aomori Wat's, Bambitious Nara, Fukushima Firebonds*, Gunma Crane Thunders, Hamamatsu Higashimikawa Phoenix, Iwate Big Bulls, Kyoto Hannaryz, Niigata Albirex BB, Oita HeatDevils, Osaka Evessa, Rizing Fukuoka, Ryukyu Golden Kings, Saitama Broncos, Sendai 89ers, Shiga Lakestars, Shimane Susanoo Magic, Shinshu Brave Warriors, Takamatsu Five Arrows, Tokyo Cinq Reves, Toyama Grouses and Yokohama B-Corsairs.
-expansion teams