|Yoshiwara was a famous pleasure district in Edo.
Yoshiwara also became a strong commercial area. The fashions in the town changed frequently, creating a great demand for merchants and artisans. Traditionally the courtesans were supposed to wear only simple blue robes, but this was rarely enforced. The high-ranking ladies often dressed in the highest fashion of the time, with (
)ight colorful silk kimonos and expensive and elaborate hair decorations. Fashion was so important in Yoshiwara that it frequently dictated the fashion trends for the rest of Japan.
(I got this from Wikipedia)