Complex sentence: Mineko Iwasaki, a geisha that Arthur Golden met while writing "Memoirs of a Geisha" described mizuage in her autobiography as being an initiation party, symbolized on the to-be geisha by a change in hairstyle.
Split into simpler sentences: Mineko Iwasaki, one of the geishas that Arthur Golden met while writing "Memoirs of a Geisha" described mizuage in her autobiography as being an initiation party. Mizuage was demonstrated on the to-be geisha by a change in hairstyle.