At the right time of day, the blood sea looks like it is filed with blood

The Blood Sea is a sea in the south-east. It lies east of Arrida and Tualaghi territories, and south of Temujai territories. It is connected to the Sea of Rostov by a manmade channel, the Channel of Assarania. This channel was dug to support the trade to Nihon-Ja.

The Blood Sea is probably based on the Red Sea. The Blood Sea gets its name from the color of the water when sunlight hits it properly, giving it a red color.