Short answers, pulled from the story.
Konami Kukeiha Club is Konami's in-house sound team, responsible for the music and sound in the majority of Konami video games. It is distinct from the 矩形波倶楽部 (Kukeiha Club) band, which is a separate in-house group that released albums of studio performances.
Konami Kukeiha Club refers to the broader sound team that creates music for Konami games, while 矩形波倶楽部 (Kukeiha Club) is specifically the in-house band that has released albums of studio performances. The two share a name and are often confused.
Miki Higashino, also known as Miki-Chan, composed the majority of the material on the Gensō Suikoden soundtrack. The Suikoden score is considered one of Konami Kukeiha Club's best-known works.
Motoaki Furukawa is the main arranger and guitarist associated with Konami Kukeiha Club. He has performed live under the Konami Kukeiha Club name with musicians who are not members of the in-house band.
Konami All Stars: The Senryo-Bako Heisei 4 Nen Ban is a Konami album with catalogue number KICA-1053 through 55. Disc 1 of the album is titled "Konami Kukeiha Club Live in Tōkyō," documenting a live performance under the Konami Kukeiha Club name.
Notable members include Aki Hata, Akira Yamaoka, Junya Nakano, Kenichiro Fukui, Kinuyo Yamashita, Michiru Yamane, Miki Higashino, Naoki Maeda, and Yuji Takenouchi.