I used to be fluent in french (in fact I knew more french than english as a child) but I haven't spoken it in 10 years so I need some refresher courses so it's a lot easier to get back to fluent than with Japanese which I've been studying lightly for a couple years now.
I do study Japanese way more often than French. Usually reading a few times a week. It has however gotten to the point where I can read Japanese much better than I can speak or understand it spoken to me.