Secret Ambition is a Japanese-language song, and the 15th single from Japanese singer Nana Mizuki.

Secret Ambition saw a massive change in Nana Mizuki's music style, dramatically changing from pop and powerpop to an explosive rock sound.

[1] Secret Ambition was the first opening theme for the anime Magical Girl Lyrical Nanoha StrikerS and the B-side, "Heart-Shaped Chant" was the theme song for PS2 game Shining Wind).

The music video of "Secret Ambition" starts off with a scene showing what a white room with a floor covered in looks like a white tea set of china ware.

The video features two Nana egos - a "dark" one, and an "innocent" one.