Cross the street from Omote-Sandō Hills, look right, and you’ll see a five-storey glass building that looks as if it has a giant, undulating white dress suspended inside. The 2010 Pritzker Prize-winning Tokyo firm Sanaa (of Nishizawa Ryue and Sejima Kazuyo) was a bold choice for Paris design house Christian Dior . Inside, surfaces of white lacquer, glass and stainless steel are an austere backdrop for the couture and cosmetics.