See + Shop: Omotesando Flagships
Omotesando is sometimes called Tokyo's Champs-Élysées for all its high-end flagship stores, but Paris would never be game for the eccentric architecture created for this fashion mecca. Hugo Boss and Tod's, designed by Norihiko Dan and Pritzker Prize winner Toyo Ito respectively, are two standouts.

Also Noted: 
Rem Koolhaas's brand new Coach flagship, Dior by SANAA, and Prada by Herzog & de Meuron.