Who wrote the music for Mega Man X?

The credits name Capcom's Alph Lyla group and five composers, which hides the actual shape of the work. Setsuo Yamamoto (credited as Setsuo) was initially the sole composer assigned to Mega Man X and contributed the vast majority of the soundtrack. The other four names appear because, late in production, help was brought in to finish: each of them wrote one track, except Makoto Tomozawa, who wrote two.
THE TRACK BY TRACK RECORD
Who wrote whatTHE AFTERLIFE OF THE SCORE
Arranged, boxed, and inheritedThe music left the cartridge quickly. The Japanese division of Sony Records published an arranged album of ten tracks on March 9, 1994, months after the Japanese launch. The original SNES instrumentals were collected on the Capcom Music Generation: Rockman X1 to X6 set from Suleputer in 2003, and Yamamoto returned to the material again for the Rockman X Sound Box liner notes, where his favorite character answer was Zero and his affection for that character's brief theme is recorded in his own words.
The rescue pattern also set the series' musical succession. The X sound stayed inside a small circle: Yamamoto's one track helpers became the next leads (Iwai for X2, Horiyama for X4), freelancer Kinuyo Yamashita scored X3, and Ippo Yamada, who assisted on X2's sound production, later composed the entire Mega Man Zero series' defining scores, deliberately treating them more like television or film than stage music.