Overseas health
I have heard that under some circumstances it is possible to use National Health Insurance Coverage outside of Japan. Is this true? If so, under what circumstances?
Yes, you can use your "kokumin kenko hoken" abroad. What happens is, you must pay the charges yourself first. Then, you will be reimbursed if you can bring in all the paperwork according to the cost that it would if you did the same procedure in Japan.
Remember, though, you cannot go overseas for treatment and then expect to be reimbursed. This is only applicable if you are traveling abroad and something unexpected happens.