Cut off from the outside world by wide moats and high stone walls, the Imperial Palace is an especially mysterious place for us "commoners." But it doesn't have to be.
Like the Diet building and Defense Agency, access to the palace is restricted, but it's not completely off-limits. In fact, all three of these places are open to visitors who follow the right procedures.
Following is a peek at what you're missing and directions on how to get inside for a better look: