This is beautiful though not exactly a traditional geisha. The name geisha brings to mind a heavily made up woman dressed elaborately for a party but I could see this being during the day time.
Color Scheme: The colors blend beautifully and you did an excellent job of picking a nice contrasting background color to match her kimono.
Anatomy: The face is absolutely perfect, the proportions look right to me and the eyes are draw you up. Her hand though seems to just appear out of no where and the arm attached to it just looks a little awkward. I think you were trying to go with a sweeping motion but perhaps define the sleeve just a but more so that it doesn't seem as though her arm was just plunged out of a gap in space or not apart of her body.
Picture Motion: I'm assuming the dark curve in the lower right hand corner is her hair. It curving to the right while her dress is blowing to the left is just kind of off if you meant this to be realistic. If you brought her other hand into the picture and hard it raised so that it looked like she had just flipped her hair over her shoulder even that would make more sense than things just flying in two separate directions.
Overall it's a nice concept and this is something wonderful to build off of.