Usher in spring at this 51st annual celebration of Japanese culture. In recent years, organizers have embraced the super kawaii world of cosplay, fashion and lip sync battles, so in addition to the more traditional displays and parades, don’t be surprised if you run into a gang of Lolitas. For those who savor custom, check out the dance and martial arts demonstrations, sit in on a tea ceremony or get a gander at some sweet Japanese steel.