Yamatai system

The Yamatai system, also known as the Imperial system, is an eleven-planet star system orbiting the star Taiyou, formerly Daibutsu-15. It is the location of the planet Yamatai, the capital of Yamatai. Yamatai is the only inhabitable planet, and is the fourth planet from Taiyou. The system comprises of six rocky planets, including Yamatai, and five gas giants. The three terrestrial planets between Taiyou and Yamatai are not inhabited, but all of the other worlds are colonised by orbital stations and moon colonies, though Yamatai and its moon Tsukuyomi are the most heavily inhabited in the system.

Notably, the Yamatai Imperial Navy's 1st Defence Fleet, which is responsible for the entire systems defence, is also the largest and most powerful single formation in the entire Navy. Consequently, there is little to no space crime in this system.