That's right, cars aren't the only mode of transportation worth customizing. Dekochari, the Japanese art of pimping your bicycle:
"Dekochari is a form of art bike indigenous to Japan dating back to the mid 1970s. 'Deko' in Japanese is short for decoration and 'Chari' is slang for bike. The Dekochari was a response by children to the Dekotora ('Tora' is short for Truck) craze which swept Japan after a series of movies called Truck Yaro was released. These movies featured giant trucks decked out in chrome and flashy lights.
Unable to drive the giant chrome-plated flashing trucks they coveted, children instead built plywood boxes around their bikes and attached chrome plating and lights. Almost all current Dekochari's have elaborate light displays and many include hi-fi audio systems and cup-holders." (Wikipedia)
Amazing images below, scroll all the way down for video.