Its always good to have some extras, and if you have a kind of condom that works particularly well for you (L size, extra thin, non latex) you should definitely bring them yourself.Is it commonly expected for the guy to bring his own, or is that one of the items that can be discussed with the provider before the session?
But the girl and the love hotel (in case you use one) are likely to have some spare ones.
Some girls may only want to use their own.