I think [TransferWise][1] is the best service for sending money out of Japan recently. They have a modern web interface and the rates are very reasonable. I've used them myself to send money to the UK and the process was very smooth.

Check out [RetireJapan's review][2]:

> 1. The website is in English, it's simple and easy to use, and everything can be done online easily.

> 2. The fee is low and the exchange rate is as good as you are going to get (they use the interbank rate).

> 3. Setting up new beneficiaries can be done online in minutes, and the site remembers information from previous transfers so sending money to the same person takes seconds to set up.

  [1]: https://transferwise.com/
  [2]: http://www.retirejapan.info/blog/transferwise-revisited