The territory of the 18th district was divided and placed into several other Ohio districts.

In the 17th century, the territory of the modern district belonged to the Simon monastery.

The roads on the territory of the district are generally in good condition.

The entire territory of the district is an island called Suō-Ōshima.

There are no manufacturing plants in the territory of the district so the economy relies on services, trade, finance, tourism and administration.

The territory of the district is 889 km 2 (3,6% of area).

No railways operate on the territory of the district.

The present territory of the district is inhabited since the stone age, 30-20.000 BC.

The territory of the modern district, known as Zaozyorye (lit.

By Danube regulation, in 1870-75, the territory of the present district was radically changed.