"Departure!" is the opening theme song for the anime series "Hunter x Hunter." The original version is performed in the key of A major. Composed by Yoshihisa Hirano, it was performed by the band Masatoshi Ono. The song is known for its upbeat and energetic melody, reflecting the adventurous spirit of the series. "Departure!" has become iconic among fans of the anime, setting the tone for each episode with its lively instrumentation and catchy chorus. It has also been praised for its ability to evoke a sense of excitement and anticipation for the adventures that await in the world of "Hunter x Hunter."