!? ... Shiga prefecture and Aichi prefecture are not adjacent ...!?

Today, I happened to look on a color-coded map of Japan, and for the first time learned that thing with astonishment.

Perhaps, there might be people other than me who wrongly think Shiga prefecture and Aichi prefecture are adjacent. Or rather ... most people know it right?

To think of this, by the way, I knew, however, that Germany and Italy are not adjacent (Austria is interposed between the two countries). It's a tidbit of knowledge I've got about geography.