Kongou Mountains

The Kongou Mountains (金剛山, Diamond Mountains) are a series of mountain ranges that surround the Yellow Sea and seperate it from the four inland seas.

The Kongou Mountains can be divided into four ranges between the four major gates that open during the solstices and equinoxes.
 * East Kongou Mountains - between the Reigon Gate and Reison Gate
 * South Kongou Mountains - between the Reison Gate and Reikon Gate
 * West Kongou Mountains - between the Reikon Gate and Reiken Gate
 * North Kongou Mountains - between the Reiken Gate and Reigon Gate