I'm not sure if this is 100% on topic strictly speaking, but I didn't want to put this in the References/Cameos thread, so I'm putting it here instead.
So... I know that Wonder Woman is sometimes discussed as a possible inspiration for Sailor Moon, but there was a Wonder Woman knock-off (so to speak) from 1947 who I think has a lot more in common with Sailor Moon: Moon-Girl.
- Moon-Girl is the Princess of the Moon (though she lives on Earth; specifically, she's from Uzbekistan, though she moves to America and appears to pass as white?)
- She falls in love with an Earth prince (Mengu) who's descended from Hercules (so the series draws on Greco-Roman mythology)
- They don't share a past life together, but their romance does echo the romance between one of her ancestors and another Earth prince, so there's that theme of history repeating
- She inherits a magical moonstone from her mother that she uses to transform and that gives her virtually limitless power
- With the moonstone she can call upon not only the powers of the moon, but the powers of the other planets as well
- She's from a matriarchal society
- She assumes a civilian identity/alter ego using a name that's a pun (Clare Lune)
- She later meets her long-lost younger cousin, Selena, who uses a magical moon jewel necklace to fight crime alongside her as Starlet, and whom she basically adopts to raise as her own daughter
Given the obscurity of the comic (it only lasted about 8 issues, undergoing a number of title changes, before being discontinued and ultimately lapsing into the public domain) it's unlikely Naoko ever actually came across it (though stranger things have happened), but the similarities are very interesting.