Torajii system

The Torajii system was a star system with several planets situated, according to the Tenth Doctor in a galaxy "half a universe away" from Earth in Mutter's Spiral. It appeared to have five planets orbiting its living star — Torajii — and the planet farthest from the sun had at least two moons. (TV: 42) It was also the location of Torajii Alpha (PROSE: 42 Prologue) and the Toraji Transport Network operated there. (TV: The Power of the Doctor)

History
An asteroid called Stanalan was inhabited here and temporarily played host to the Galactic Fair with the highly acclaimed "Death Ride" inside. Inside a chamber, Drexxons were trapped. (PROSE:  Death Riders)

Later, the Thirteenth Doctor attempted to stop CyberMasters on a Toraji Transport Network bullet train travelling through space. (TV: The Power of the Doctor)