Hey Folks. I've read BESM, other d20 games that try and do anime, and other story games which hit the genre they're aiming at pretty well. All that said the Anime Hack is light, easy to understand, has all the basic building blocks you need if you want to kit bash together your own anime game, and it's affordable. You'll have to do a little work to put together the exact anime game you're looking for but as a place to build up from this games got it right.
If you're not familiar with the X Hack games they have a mechanics where you have resources tied to dice which diminish over time when you use them. In the Anime Hack it uses Stress Veins and Genki which are those moments when character push through a tough situation or unleash a bunch of energy to get the job done. It's a pretty great mechanics to get your One Piece or Super Saiyan moments at the table.
If you’re not an anime fan then I wouldn’t suggest this game for you, but if you are I think it’s a must buy. For $5 you really can’t go wrong.