"Yatta!" is a 2001 parody song by a fictional Japanese boy band called . The one word in the song title, ', is the past tense of the Japanese verb yaru ("to do") and is also the familiar short form of yarimashita, an exclamation meaning "It's done!", "I did it!", "Ready!" or "All right!" The song was first performed as a sketch on the Japanese sketch comedy show , known as Silly Go Lucky in the United States, where Happa-tai is portrayed by some of Japan's most well-known comedians.
The video features its members singing and dancing exuberantly while wearing only underwear with a lar...