Earth

The Earth, also referred to as the Ninja Land is the third planet from the Sun, the densest planet in the Solar System, the largest of the Solar System's four terrestrial planets, and the only celestial body known to accommodate life. The Earth's biodiversity has evolved over hundreds of million years, expanding continually except when punctuated by mass extinctions.

Overview
Humans are the dominant species of the earth coexisting with animals and plants just like the real-world modern day Earth. However a number of Deities, Like Yulia Jue, Zeus or Thor are also present on the planet. Although many countries have been seen, the country most adventures take place in Shinto Island based on the Island of Japan.