[AlexanderHowl]

The Oni System was colonized by Japanese immigrants over 3,000 years ago. In addition to three terraformed terrestrial planets that were seeded with Earthlife, the Oni System possesses five dense asteroid belts and five gas giants. The colonists embraced the principles of isolationism, so they were untouched by the Dark Age that plunged the rest of Human Space into chaos for two thousand years.

Recently though, a few of the neighboring systems have recovered FTL capabilities and have been established trade networks with the local systems and, when the inhabitants are nonexistent or primitive, they have conquered the system. A dozen petty empires have evolved in recent decades that surround the Oni System, and it is only because the Oni System maintained the old technology that they have not been able to conquer the system.

The Oni System is a TL12 enclave surrounded by TL10 neighbors. Since its safety depends on its technological superiority, it forbids any trade with outsiders. Anyone who violates the ban finds themselves transformed into sapient pigs by metamorphic viruses, doomed to spend the rest of their existence rooting around in the wilderness preserves of the two terrestrial worlds with the memories of their human lives.