According to this article, Japanese Budget Airlines are going to accept bitcoins this year. They declared that later this year we can now enjoy flights without bringing our wallets but our bitcoins in our smartphones. As part also of their new innovation they have installed BTMs or Bitcoin ATM on the airport for the convenience of their customers. With this we can expect an increase in tourist visits to Japan.
It's looks like bitcoin can be has the same function as transportation card but we can use it for something else too. It is proof that the cryptocurrency is really usefull.