While Omotesando’s main stretch is mostly occupied by international brands, quieter Aoyama boasts the flagships of Japan’s ‘big three’ names in fashion: Issey Miyake, who exploded onto the global fashion map in the 1980s for his colorful, geometric designs made with experimental materials; Rei Kawakubo, a renegade-chic icon who launched the Comme des Garcons label in the 1980s; and Yohji Yamamoto, known for his black flowing garments made with Japanese tailoring techniques. Also keep your eyes open for the bubble-like Prada shop. This five-sided structure is wrapped in diamond-shaped windows of convex glass.