Localize toggle for JA locale

Now it looks like this: 

![on](http://f.cl.ly/items/1n1g2F1F003S2W3m1Q0e/Screen%20Shot%202013-07-18%20at%2011.13.07%20AM.png "on")

![off](http://f.cl.ly/items/2n2G0C3b0t2H0O3S2F21/Screen%20Shot%202013-07-18%20at%2011.12.55%20AM.png "off")

Addresses #8.