Not a fictional story; this is Iwasaki's autobiography.
The most successful geiko of her generation and the only one to ever speak out about her experiences in the 300-year history of the geisha. She left the profession at the age of 30, when she was at the peak of her career, because she found it 'too constricting to continue.'
Iwasaki's autobiography unviels the mystery of the geisha and everything surrounding it. She goes into great detail about the rules, etiquette and hierarchey of the okiya (lodging house or geisha house) and explains - and sometimes dismisses - the rumours surrounding the lifestyle.
I'm only about a third of the way through this book, but from the first page I was hooked. Iwasaki's life was interesting from the time she was an infant, before that, even. She explains her family tree, which includes aristocrats and pirates, and tells of how she feels she betrayed her parents to be adopted by the Iwasaki 'family', who wanted her to be the atotori, or heir, to the okiya of Gion Kobu.

I highly recommend this to anyone who is interested in the traditional culture of Japan.
And when I've finished, I'll let you know what I thought of the whole book!