Picture this place in 1590, before the shogun Tokugawa Ieyasu entered Edo Castle. The area we now call Marunouchi was an inlet of Tokyo Bay, and it went by the name Hibiya. There were no avenues and no offices, only shoreline and water lapping at the edge of the castle's future. Then the castle grew. As it expanded, the inlet was filled in, beginning in 1592. A new outer moat was dug, and the earlier moat took on a new role as the inner moat. The ground that lay within that new outer moat is the origin of the district's name, Marunouchi, meaning inside the circle. That reshaping of land and water set the pattern for everything that followed. When you stand here today, you are standing on ground that was deliberately made, on the edge of the seat of power. Keep that in mind when you look toward the palace greenery. The moat that defined this district shaped its geography, its name and its identity long before the first office tower rose.