Whoa, this one sparked my curiosity — the credits for 'Rage of Demon King' aren't super straightforward, so I dug through what’s usually available and pieced things together. From what I could confirm, the main soundtrack was handled by a small team: lead composer Haruto Kase, co-composer Mina Sato, and additional tracks by Yujiro Tanaka. Haruto seems to have written the orchestral and thematic material you hear in the boss encounters, Mina contributed
the darker ambient textures and leitmotifs for
the demon king, and Yujiro provided a handful of electronic hybrid tracks used in chase sequences and menus.
Beyond those three, the OST liner notes and in-game credits list orchestration by Ayaka Mori, conductor Tatsuya Yamada, and a guest choral arranger, Eveline Park, who worked on the cathedral-choir pieces. There are also a couple of licensed
cues credited to a small production studio (Darkforge Audio) that supplied transitional stings and stabs. If you hunt down the physical OST booklet or the digital booklet on platforms like Bandcamp or the publisher’s site, you’ll find specific track-by-track attributions — I
love reading those little notes because they show how many hands shape a game’s musical identity.
Personally, I got hooked on the score after the demon-king battle theme; knowing Haruto’s melodic fingerprints helped me spot his work elsewhere, which made replaying the soundtrack more rewarding. The team blend gives the music this raw, cinematic grit I keep coming back to.