Short answers, pulled from the story.
Konami Kukeiha Club functioned as the internal audio production team for video games while 矩形波倶楽部 operated as a real-world band releasing live studio albums. The club produced music for most Konami titles whereas the other group focused on creating recordings of their performances.
Miki Higashino composed the majority of material for the game Gensō Suikoden under the nickname Miki-Chan. Her melodic themes and atmospheric textures defined the emotional core of the project and remain a standout achievement for the collective.
Disc 1 of the Konami All Stars: The Senryo-Bako Heisei 4 Nen Ban album carries the specific title Konami Kukeiha Club Live in Tōkyō. This release documents a concert event where musicians gathered outside standard development duties with the album code KICA-1053~55 identifying the collection from Tokyo venues.
Aki Hata worked alongside Akira Yamaoka within the team during its active years while Junya Nakano and Kenichiro Fukui also held positions contributing to audio production. Kinuyo Yamashita, Michiru Yamane, Naoki Maeda, and Yuji Takenouchi rounded out the roster of key personnel who developed unique approaches.