"Kokoro no Wakusei ~Little Planets~" (こころの惑星) is Aiko Kayō's seventh single. It was released on May 25, 2005, by Avex Trax. Kokoro no Wakusei ~Little Planets~ was used as the first ending theme for the animeThe Law of Ueki. The b-side track is a cover of one of Kylie Minogue's older singles.