I'm planning to fly AF Tokyo Narita (via Nagoya) to Paris CDG Business Class. I have a lot of baggage and ideally would like to take 4 cardboard boxes of 23kg each as excess baggage.

Is there likely to be any problem with this? I mean, is there a limit to how many items of excess I can take?

I plan to book my ticket the earliest I can in advance and book the excess with AF online.