Designer Natsuki Shigeta creates yukata (cotton kimonos) with a punk-rock slant (and sometimes outré prints). Nevermind if you can't tie the obi (sash) properly, these are meant to be worn in a louche, disheveled manner (or over one of her T-shirts).
The shop is all but hidden in the back of an apartment complex; enter from the alley behind and look for the jewellery vending machine out front.