Kokia has also released several music videos, mostly centred on her Mother Land management era with Victor Entertainment.

She has written several songs for other artists, most notably "Inori", a song sung by Mobile Suit Gundam 00 voice actor Ayahi Takagaki in the role of her character Feldt Grace.

[2] Five of Kokia's singles have sold over 10,000 copies, with one of them, "The Power of Smile/Remember the Kiss," being certified gold by the RIAJ.

Since switching to her self-managed label Anco&co, Kokia has only filmed one music video, "The Woman," while in the Tunisian Safari.

Kokia has appeared on many compilation albums, either with songs performed by her (often also written by her) or as a background vocalist.