If Naruto has to start out in base form then he probably looses as he'll have trouble with his clones pretty much being fodder while he tries to gather SM, and Kazuma could probably get to him before it's complete. If he starts out in SM, it all depends. Can he in the fight in five minutes or not. And with Kazuma's willpower to keep going I don't think he can, and Naruto won't have the clones to back-up his SM.
So either way he looses but if he starts out in SM I think he'll have the upperhand until he's no longer able to use it. And I highly doubt Kazuma would give him any reason to go tailed-mode. Or at least above 3, which he can control himself. But SM > 3-tails.
__________________ If you try something stupid, and it works it ain't stupid.
i dont know, this is kind of tough, kazuma in his max would be really tough for naruto but naruto in sage mode is REALLY tough. and also if naruto gets really pissed and lets the kuubi out there is no way he can beet that
Kazuma wins, period. He and the other guy(can't remember his name) went level 3 and owned a being who so powerful, it was mind boggling, Plus he ends the fight before Naruto can use his Kyuubi chakra, and, this is a fight between Kazuma and Naruto, not Kazuma, Naruto, and the toads.