Pro-choice, definitely. No one should have the right to tell an able-minded/bodied woman(or anyone else) what to do with their own body. It's just ridiculous. Plain and simple.
However, I do believe people need to try harder to practice safer sex, because abortions are not good for you physically and they are usually not good for you emotionally either.
Also, correct me if I am wrong, but I think in Japan, you must have the 'father's' signature in order to have an abortion? I've also heard from friends that some Japanese girls/women will use abortion as a kind of birth control. Having pregnancies terminated repeatedly, which will definitely harm your reproductive organs(namely uterus).