Keigo Sonoda's info from tonami club: http://www.smash-net.tv/player/details/id/64/ my guess is the other 2 WD players are from the same club, but not sure..
the WD players aint the national team players. they are belong to the 岐阜トリッキーパンダース team Wakita Yu (脇田 侑) http://tricky-panders.com/3_member/panda_member_waki.htm Eto Rie (江藤 理惠) http://tricky-panders.com/3_member/panda_member_eto.htm it seems that they are new pair....