This annual event is held in Omote-sando, a glitzy district of Tokyo near Shibuya and Harajuku.
It is the brain-child of Anna Wintour and is a way to celebrate fashion and designers, boost sales and for people to dress up and shop!
There is an opening ceremony, DJs, celebrities, designers and stores open until 11pm.
Also, they give out free alcoholic beverages in stores and the shopping centers.
There are special offers and promotions, as well as exclusive items.
People wear unique and over-the-top outfits and strut around Omote-sando and it spills into neighbouring Harajuku and Aoyama.
Head into Omote-sando Hills shopping center for DJs, free booze and shopping.
The shopping is not cheap!
But a lot of the sales and profit goes to non-profit organisations and charities!
Check out their official site here.