Translating lyrics is like capturing lightning in a bottle—you lose some electricity in the process. '日々と君' has this delicate balance between everyday intimacy and poetic abstraction that's tough to convey. The title alone could swing between 'Days and You' or 'Everyday With You' depending on whether you prioritize literal accuracy or emotional resonance.
That recurring line about 'light filtering through curtains' might become 'sunlight dances through the blinds' in English to preserve the kinetic imagery. The Japanese tendency to imply subjects creates ambiguity—is the singer addressing a lover or reminiscing about a friend? English demands clarity, so translators often have to choose one interpretation and lose the beautiful vagueness.