What makes Onna ga Medatte Naze Ikenai by Morning Musume notable?

The single debuted at number one on the Oricon charts, solidifying its status as a commercial triumph. It also marked a notable shift towards more assertive themes focusing on female empowerment in J-pop, influencing subsequent girl groups aiming to present strong, independent identities. Released on February 10, 2010, 'Onna ga Medatte Naze Ikenai' was Morning Musume's first single of the year, following their significant success with the previous album 'Fantasy! Juuichi.' At this point, the group had solidified their place in the J-pop scene but faced the challenge of evolving their sound to maintain relevance in a competitive market.