I dunno about 'female empowerment', but maybe just 'empowerment' in general suits the song pretty well, don't you think? Maybe older generations of Japanese people wouldn't find it 'empowering' per se, but this sort of language may be aimed at a youthful crowd.
I like the lyrics, they're really inspiring to me atm since I feel like there's something I should be doing, but I don't have enough courage to step forward and do it. I think that maybe the first set of lyrics feel a bit disconnected from the song, but I think Ayu was simply experimenting and trying to do something "kakkoii", maybe for shock factor.
But for a 'step forward and do it' type song, I prefer Bold & Delicious. The lyrics and arrangement are just more uplifting and less aggressive. I feel like this is more of a 'you're in the club, go dance with her/him' because of the general dance sound and lyrics. Startin' too, perhaps, is a better 'step forward and do it' song, while it was aggressive, it had power. Sparkle seems kind of aggressive, but I don't sense too much power in it. Rather, it seems like it's telling you step forward and do something that you shouldn't be doing just for the sake of being crazy like 'hey come take some of these drugs, they'll make you feel good' lmao I'm sorry I'm not making any sense right now, am I?
Sparkle does remind me of a trashy underground erotic club with people on drugs though. Kouki Tange PV plz. <3