It's probably the most crowded street in Japan. But Harajuku is the center of Japanese street fashion, visual kei, Japanese famous lolita huge dresses and all crazy souvenirs in Japan. Moreover, there are great sweets shops and street food. You may also buy summer kimonos (yukata) and other traditional Japanese goods.
1 Chome-19 Jingumae, Shibuya, Tokyo 150-0001, Japan