"Lemon" is a J-pop song that also carries strong elements of a melancholic ballad and an elegy or song of mourning.
Centered on themes of loss and death, it embodies a blend of sorrow, bittersweetness, and the power of gentle healing.
This song was written specifically by singer Kenshi Yonezu for the forensic-themed drama *Unnatural*. After the passing of his grandfather, he gained a firsthand understanding of death and channeled his longing for the departed into the music.
The song is titled "Lemon," a metaphor for complex emotions that are bitter and poignant yet possess a refreshing, lingering sweetness—much like a sliced ​​lemon: while it may bring tears to one's eyes, it leaves behind precious, unforgettable memories deep within the heart.