Supercell is being sued by another Japanese gaming company called Gree for patent infringement; particularly relating to the layout editor. As the litigation procedures are ongoing they will turn off the layout functionality in the Japanese version of the app.
Since yesterday, they remove the layout editor for all people playing in Japan and you only have one Home Village, one War Base and one Builder Base layout.
If this affects you, whether if you’re living in Japan or you will visit Japan and it is now confirmed that Supercell does that by checking your IP-Address.
The good news about that is that you can still us it when being in Japan by using a VPN that will redirect through another country than Japan.
You can use any app you find on the AppStore or Play Store, I personally use CyberGhost:
In general, I think Supercell will find a workaround very soon to bring it back – and this only affects Japan and no other country in the world 🙂