It's said to be the place in which he resides, and our skies are so often called the heavens. Please do not trouble yourself with not knowing such things, sir. I cannot claim to be any manner of expert on Japan. It is most admirable that you should desire to learn, if nothing else. [Jeeves quirks his lips to offer some reassurance.]

The portals appear to work by intent. You need only think of the place to which you should like to travel, and they will take you there.