Composer

Keita Kawaguchi

川口圭太

Tokyo, Japan

Arranger and programmer with Fifty-seven Published Arrangement Credits, and Ryokuoushoku Shakai’s principal outside arranger. Co-arranged with Shingo Anami the band’s biggest tie-ins, Become a Flower (the apothecary Diaries opening), Clear Skies (Fuji TV’s Asian Volleyball Championship 2026), Go Your Way (the drama First Penguin!), party!! (Delicious in dungeon ending), Pink Blue (whose sound design natalie singled out as “not the Ryokuoushoku Shakai we knew”), Night Festival Ondo, Aun and Little Singer. Beyond the band: Young Kee’s Invincible (Wind Breaker ending), Mei-chan feat. Hatsune Miku’s See You Next Week (with primagic), and Hayato Yoshida. On Clear Skies he describes receiving Anami’s “strongly-cored” demo and letting it become a physical, band-strength track with almost no overdubs, the album Atamago (September 2026) followed. Recording partners on the band’s work: engineer Nobuyuki murakami (recording and mix) and mastering engineer Mitsuyasu Abe; drummer Hiroshi Kido.