Idzumo Bridge

The Idzumo Bridge (最初の部分, Japanese for "original field bridge") is the entrance to Idzumo's headquarters.

Overview
The Idzumo Bridge is named after Idzumo, although it was created several centuries before Idzumo arrived at it's location. Although it's original name has long since disappeared, it's initial purpose is still in use. When it was created, it was planned to be a literal bridge that connected the to, which would allow pluses to make there way to Soul Society without the assistance of the shinigami.

The bridge is built out of blue stone, which creates a barrier that negates all spiritual energy that steps onto the bridge, making a person's reiatsu rendered useless. However, Idzumo has modified the stones so that he is, as well as any of his allies, can step onto the structure without feeling the effects of the sekkiseki stones. This modification allowed him to release his spiritual energy within the confides of his home/since the sekkiseki barrier encompassed that part of the mountain as well.

History
Long before the founding of, the Captain-Commander of the time ordered the construction of the bridge. He believed that pluses should be able to find their way to Soul Society without the help of shinigami. Building of said bridge was started immediately, but the project soon came to a hault, with the appointment of as the new Captain-Commander stopping the construction of the bridge completely. Some considerable time later, the bridge was completed.

Several centuries later, a shinigami by the name of Idzumo would discover the unused bridge and make it the entrance to his headquarters. Believing that no one would mind, he eventually gave it the name Idzumo Bridge, finding it to be his, and no one else's. Since he first arrived, Idzumo has made minor changes to the large structure, such as changing the properties of the sekkiseki stone that it had been constructed with. Another modification he made was altered the abilities of his zanpakutō to bring the bridge forth whenever his Shikai was activated.