Sci-fi roleplaying and worldbuilding community

User Tools

Site Tools


Jiyuu I

Jiyuu I is the first planet in the Jiyuu System, it is part of the Yamatai Star Empire.

An Oil Painting of Jiyuu I, circa YE 29

About Jiyuu I

A terrestrial world, Jiyuu I was first studied and mapped in YE 29 by scientists on the YSS Akuro II. While the planet did not have much promise for traditional colonization methods, it held the potential for resource extraction and research.

The planet is very close to the central star of the system. It has a tightly held, unstable, trace atmosphere of hydrogen, helium, oxygen, and sodium. The rocky planet is affected by intense solar winds and extremely high temperatures.

Statistics for Jiyuu I
Type Terrestrial Rock Planet
Radius 1.79 x 107 km (0.3 AU)
Period 7.26 x 102 hours (0.08 earth years)
Gravity 14.08 m/s2 (1.44 x earth)
PAINT Station No
Facilities and Bases Automated
Colony No
Population None


Jiyuu I has automated extraction facilities for Helium-3 and subterranean mining for Iron, Copper, and other metals. The facilities were operated by Motoyoshi Fleet Yards until YE 33. Production ceased after the evacuation of the system due to the invasion of the NMX. In YE 42, the facilities are now owned and operated by the Yugumo Corporation.

Places to Explore or Salvage

Jiyuu I has some interesting locations:

Abandoned Facility

The planet has an Extreme Environments Testing Facility which was operated by Motoyoshi Fleet Yards while the United Outer Colonies controlled the system. The facility remains abandoned and non-operational. Rumors have circulated that the facility was left intact during the evacuation, and that the equipment and research are still in the facility which is now owned by the Yugumo Corporation.

Crash Site

The crash site of a Ionoche class Light Carrier, the UCS Niko, is present on the surface of the planet in one of the larger craters. The ship crashed into the moon while trying to make an escape from the system in YE 33, during the NMX attack on the system. No confirmation has been made on the condition of the crashed ship or its contents.

Orbital Assets

The Star Army of Yamatai established a "Guriddo" Defense System as part of the Jiyuu System Defense Plan laid out by Ketsurui-Motoyoshi Katsuko in YE 42. The system is designed to provide coverage for Jiyuu I and Jiyuu II, it includes:

The planet also has an orbiting network of Emrys Satellites for communications that were deployed by the Star Army of Yamatai in YE 36.

An old Orbital Geological Survey Platform remains in orbit and operational, a remnant of the days of colonization which somehow has survived the strife faced by the system.

OOC Notes

Andrew created this article on 2020/01/22 03:20.

Places of the SARPiverse
Place Categoriesplanet

planet/jiyuu_i.txt ยท Last modified: 2022/08/25 13:48 by wes