"Saika" is a song from the anime Naruto, serving as one of its ending themes. The original key of the song is in E minor. It is performed by Japanese rock band, Wagakki Band. Composed by Asa, the song "Saika" is known for its blend of traditional Japanese instrumentation with modern rock elements, creating a unique and captivating sound. The lyrics of the song express themes of determination, strength, and the bonds between friends, which are central themes in the Naruto series. "Saika" is appreciated by fans for its powerful vocals, energetic instrumentals, and its ability to evoke the spirit of adventure and camaraderie found in the anime.