There's also Shingo Kataoka from TOSE, who is credited as BGM composer & arranger. TOSE is handling sound and music for this game.
The sound team appears in this video:
https://www.youtube.com/watch?v=ljJvU9p2NCQ (at 5:37 you can see TOSE BGM director Kenjiro Kato, sound manipulator Masato Nakamura, and Shingo Kataoka)
Ryo Yamazaki composed the opening song, "Innocent²", and the ending song "World Parade" was composed by noisycroak's Ryo Shirasawa.