Ah okay, honestly I think Fuji has the matchup advantage against Kizaru. Because Gravity at a certain point can affect even light.
I also believe he is a better swordsman than Kizaru, I mean he was litteraly called a swordsman in the SBSs and is designed after the actor who's famous for playing Zatoichi the Blind Swrodsman, a really famous swordsman/ronin in japanese culture, etc. So yeah while Kizaru uses swords its not his main weapon. I can see Sanji fighting Kizaru more than Zoro fighting him. It seems like GB is also a swordsman and he is possibly from Wano. Would make for a great fight against Zoro in the final war.