In the context of the film, "Hikoukigumo" serves as a bridge between Jiro’s professional ambition and his personal grief.
She likened her friend’s short life to a "vapor trail"—a white line in the sky that is brilliant for a moment before disappearing. Kaze Tachinu - Hikoukigumo
Matsutoya wrote the lyrics after the death of a childhood friend who suffered from muscular dystrophy. In the context of the film, "Hikoukigumo" serves
Just like a vapor trail, Jiro’s "ten years in the sun" (his creative prime) and his time with Naoko are intensely beautiful but painfully short-lived. In the context of the film