Happiness is so fundamental that it's featured in the United States Declaration of Independence. People everywhere pursue happiness when they can, and Japan is certainly no exception.
When we went to NHK Hall for K's graduation ceremony, we got off the train at Harajuku. The station is in front of Meiji Shrine and Yoyogi Park. A part of Shibuya Ward, Harajuku is known for its youth and fashion culture. One is always sure to see lots of interesting people there.
Perhaps that is why Harajuku is Happy! Full screen recommended. Enjoy.