He employs techniques such as polyrhythm, tone clusters, polytonality, brass glissandi and polymodal chromaticism to create unique musical textures.
He mentioned having listened to Miles Davis, Thelonious Monk, Eric Dolphy and John Coltrane, among others.
Some of the awards he has received include first prize in the Axia Tape Competition, in Japan, during his high school years, and New York's New Music for Young Ensembles.
In 2002, Hirano paired with pianist Masako Hosoda to form the unit Bleu, releasing 3 albums since then.
[9] Although Hirano's style can be considered unique and innovative, he cited the composers Isang Yun, Toru Takemitsu, John Zorn, George Crumb, Olivier Messiaen, Tan Dun, György Ligeti and Maurice Ravel as sources of inspiration.