User blog comment:12th Supernova/Chapter 776: Bastard of the Colosseum/@comment-53507-20150212205046/@comment-26082375-20150213052332

I wouldn't say sexism is an issue here. One Piece is a shonen series, with a target audience of younger male readers. Most of the extremely badass scenes are done by male characters because if the intended readers are going to be male, it only makes sense to focus on the men so that they're more relatable.

That said, I also don't think the women are portrayed as "weak." Ace only survived his infancy because Rouge sacrificed herself to save him. The Straw Hats wouldn't be able to get anywhere without Nami's navigational skills. The "crybaby princess" Shirahoshi spent a decade locked in a tower with the knowledge that Hody murdered her mother, but chose not to hate him because of her final promise with Otohime, and also chose not to tell anyone so that no one else would hate him either. It's not always just about physical strength.

If you do want physically strong girls, though, check out Amazon Lily.