Ark Sano's musical activity expands from performing at clubs and concerts to music education, composition, arranging, studio recording, producing, etc. Among those, composition is one of the most emphasized areas. His extensive taste for music enabled him to compose various styles of music other than his major field, jazz and classical music. His compositions received plenty of great reviews for its individual, intellectual, meanwhile warm, affectionate and friendly melody, harmony, and structure. His compositional style covers diverse phases from orthodox to contemporary.

He often performs his jazz compositions at live performance. His second leader album "In Storm, In Breeze" which has released recently, contains four of his latest jazz compositions.

He has completed the project of arranging all 25 pieces of Burgmuller's "Leichte etuden Op.100" for flute ensemble. Currently he is finishing and proof-reading a series of piano compositions he wrote by the commission of New Life Christian Church for his next CD project "Piano Hymns", while writing scores for Japan America Chamber Ensemble which he is a music director of.