Setup: iPhone
Select Settings from the home screen

Select General

Select Network

Select VPN

Select Add VPN Configuration

Click on the PPTP button, type in VPNinja for the description and one of
jp1.ninserver.com (Japanese server)
for the server:

Type in the VPNinja username and password that you received via email

Make sure RSA SecurID is off. Make sure Encryption Level is Auto. Make sure Send All Traffic is On. Make sure Proxy is off. Click Save

Press the VPN ON switch and watch it start

Confirm that the connection is on by looking for the VPN badge on the title bar.

Any time you want to turn on the VPN you can use the "Settings > VPN" switch. Now roam the 'net like a Ninja.

