To add to the above, the official website has the sound producers as arrangers too.
Code:
http://www.jvcmusic.co.jp/maaya/downtown/
I've managed to clean the notes so that it is easier to read now. Added all the missing information as well.
Seigo Takimoto [滝本成吾]:
Code:
https://twitter.com/imp555sts
Mitsuhiro Konno [紺野光宏]:
Code:
https://musicbrainz.org/artist/a5e31184-8bdc-4bed-bf1a-e38f43bdf534?all=1
https://www.musicman-net.com/sp/townprofile_mu0212p.html
Josei [丈青]:
Code:
http://spiralrecords.jp/artists/josei
Akita Goldman [秋田ゴールドマン]:
Code:
https://musicbrainz.org/artist/75ed2cc8-f3d5-4671-98ec-becb74cb580a