Hasegawa was born in Osaka.
Piano and violin were Hasegawa’s first musical instruments and started his musical career in earnest.
After playing in various bands as a guitarist and keyboardist, he composed hundreds of music works as a commercial music composer.
Since then Hasegawa was involved in the works of various artists as a musical arranger and sound producer. He actively provides works utilizing his unique orchestration and great taste in arrangements in films, TV dramas/shows, and stages.