The list, for those who aren't aware, is their way of establishing some quality control in regards to visiting boxers and helps prevent poor level imported fighters from fighting regularly on the Japanese scene. For those fans of European boxing it effectively stops the equivalent of the "Latvian Lemmings" which were popular in Britain a few years ago.
Talking about Europeans it's worth noting that one of the fighters who is now banned is European Heavyweight Oleksandr Nesterenko (9-4, 4) who put up a shameful effort yesterday against Kotatsu Takehara (11-11-3, 5), before pulling out at the end of round 3. The JBC's reason for the ban is "lethargic effort" though that almost makes it sound like Nesterenko made some effort, when he didn't.
The other ban was handed to Sunthon Biakrathok, AKA Sunthonpetch Korat Sport School (0-3), who suffered his 3rd stoppage loss in Japan in just 5 rounds when he was stopped by Kenji Fujiyama (6-5, 4). It seems that the JBC have had enough of him failing to really give and effort and given him a ban "lethargic effort" just like the one they gave Nesterenko.
(Image, from the Takehara/Nesterenko fight, courtesy of boxingnews.jp)