I studied Japanese. I would not say I learned it. No, it is really far too complex, both socially and conceptually, for an adult (at least not me) to really become proficient. It is much more easily understood than produced. (It drove me a bit crazy - one example is that there are different words for counting numbers depending on what you are counting. Five sticks, five bottles, and five years will all use different forms of "five"). The social nuances are complex too, but not so bad.
I've forgotten entirely too much, which I regret since I worked so hard. It's been some years. I had a student last year, first grade iirc from Japan. I could no longer read or speak on the level she wrote/spoke on. Use it or lose it, they say.
I'm probably going to concentrate my study in Greek from now on anyway. Being surrounded by a Greek community helps at least.
But my brain only holds so much anymore.
