stolen from jplop:
Seishun Kozo ga naiteiru lyrics and composition by Tsunku, arranged by Egami Koutaro
Yuugure wa ameagari lyrics and composition by Tsunku, arranged by Suzuki Shunsuke
http://www.girlsnews.tv/unit/204899Morning Musume. '15 will be singing the theme song "Ima Koko Kara" (イマココカラ) for the dance. lyrics by Kumiko Aoki, composed by Hideaki Takatori, arranged by Okubo Kaoru
Suzuki Shunsuke:
Arranging Yuugure wa Ameagari
Arranged:
Mikaeri Bijin, Waratte! YOU, The Matenrou Show, Ai no Sono, Mr Moonlight, NEXT MYSELF, Tokai no Hitorigurashi, Dance de Bakoon, Towa no Uta, Gaki Taishou, Romance wo Katatte, Yuujou Junjou wo Seishun, Hotaru Matsuri no Hi, among others.
(That's a big variety of songs.)
Egami Koutaro:
Arranging Seishun Kozou ga Naiteiru.
Arranged:
Kirari to Hikaru Hoshi, Dakishimete Dakishimete, Makeru Ki Shinai Kon'ya no Shoubu, Atarashii Watashi ni Nare!, Onna ni Sachi Are, 1-Oku 3-Zenman Sou Diet Oukoku, Onna no Sono, Tokimeku Tokimeke, Itsumo to Onnaji Seifuku de, among others.
(Tells you what type of song Seishun Kozo ga Naiteiru is.)