Name of this style of dancing?

A year or so ago I saw a few videos on YouTube of Japanese youths dancing to what sounded like Techno music, and the dancing was really cool. It was kind of fast, kind of jerky, but in beat with the music. I can't for the life of me remember the name of that type of dance. I like it was called "trip dancing" or something, but I can't find anything relevant on YouTube when I search that. Please help!