[Zanasea]

Alright, here is the composer breakdown based on that thread:

Norikazu Miura
Disc 1 tracks 1, 2, 3, 4, 5, 9, 15
Disc 2 tracks 1, 2, 17, 18, 20, 22 (arranged by Jun Abe)
Disc 3 tracks 1, 2, 7, 19, 20

Yoshino Aoki
Disc 1 tracks 8, 24, 25
Disc 2 tracks 5, 6
Disc 3 tracks 3, 4, 8, 9, 10, 11, 17, 18

Kaori Komuro
Disc 1 tracks 10, 11, 12, 13
Disc 2 tracks 21, 23
Disc 3 tracks 23, 24, 25, 26

Masaharu Iwata
Disc 1 tracks 6, 14, 16
Disc 2 tracks 9, 10, 11
Disc 3 tracks 13, 14, 15, 16

Hitoshi Fujima
Disc 1 tracks 17, 21
Disc 2 tracks 3, 8, 13, 14

Junpei Fujita
Disc 1 tracks 18, 19
Disc 2 tracks 4, 7
Disc 3 track 12

Tomoaki Hirono
Disc 1 tracks 7
Disc 2 tracks 12, 19
Disc 3 tracks 5, 6

Daisuke Kikuta
Disc 1 track 20
Disc 2 tracks 15, 16
Disc 3 tracks 21, 22

Masato Nakayama
Disc 1 tracks 22, 23

I'm not sure it is absolutely reliable, although the arranger credits for disc 2 track 22 seem quite precise. It has never been mentioned before, I guess?

Is this from the sound test?