Animax first launched as AnimeCentral, a sister channel of the original Animax.
Pop Girl was launched replacing AnimeCentral. As a sister channel to Pop, and aim for girls.
Pop Girl was renamed to Animax, after the original Animax became AXN Spin, while still using the logo from it's older counterpart + it was refocused back to anime.
The logo was changed to this in 2014, but fans of the channel didn't like the new logo.
Due to popular demand, the channel return it's 2007 logo.