Kazuya Kamenashi releases his 1st album. The album title "WAVE" expresses the "waves" of the heart and emotions, as well as the "wave" of the range and gradation of the album songs, and this is a work created centering on songs that moved Kazuya Kamenashi himself. The album includes a total of 12 songs, all newly recorded, including the album lead track "WAVE," the drama "Stove League" theme song "Diamond" (music provided by Sora Tomonari), and "'O sole mio," which serves as the image song for Nippon Television's professional baseball broadcast "DRAMATIC BASEBALL 2026" and the theme song for Nippon Television's "Going! Sports&News" (music provided by GRe4N BOYZ). In addition to the 12 tracks included in all editions, the Limited First Edition includes bonus video featuring the music video for the album lead track "WAVE" and making-of footage documenting the production of the album "WAVE," including recording, jacket photography, and music video shooting. For the Limited First Edition, the contents are identical for the Blu-ray edition and DVD edition. Jacket visuals and product specifications differ between the Limited Edition and the Regular Edition.