Was able to find out more information on Akihiko Yoshida & SHAKES. Akihiko Yoshida is a trumpet player.
Here's some notes from [
http://animestyle.jp/2015/01/27/8583/ ]
Forgive the rough english translation but we have a confirmation on all the members:
One trumpet with a trombone and two sax. Besides drums, bass, two guitars, a piano, Latin percussion, and a synthesizer was added a brass rock band organization. Participating members are Trumpet · Shin Kazuhara, Hayashi Kenichiro, Nishimura Koji, Trombone · Matsumoto Osamu, Sax · Hirahara Makoto, Kinjo Hirofumi, Drums by Yuichi Tokashiki, Bass by Naoki Watanabe, Guitar · Nozomi Furukawa and Jun Kajiwara · Jun Fukamachi for Piano, Latin percussion and the synthesizer is Akihiko Yoshida himself. It is a luxurious member who has players who also act as solo musicians. The name of the performance is Akihiko Yoshida & SHAKE'S.