Blue Bird (Ayumi Hamasaki song)

"Blue Bird" is the 39th single released by Japanese singer Ayumi Hamasaki, released on June 21, 2006. It was the first single from her eighth studio album, Secret.

The single features four tracks: "Blue Bird," "Beautiful Fighters," "Ladies Night," and "Rainy Day". "Blue Bird" served as the theme song for the TBS drama Team Medical Dragon. "Beautiful Fighters" was used in commercials for Panasonic's D-snap and D-dock products.

"Blue Bird" is a primarily J-pop track with elements of rock. Lyrically, the song reflects themes of hope, perseverance, and overcoming adversity. The "Beautiful Fighters" track is a more upbeat, rock-influenced song, while "Ladies Night" is a club-oriented dance track. "Rainy Day" is a ballad.

The single performed strongly on the Oricon charts, reaching number one and achieving platinum certification from the Recording Industry Association of Japan (RIAJ). "Blue Bird" is considered one of Hamasaki's signature summer songs and remains a popular track in her discography.