56 A.S. Planet Honshu is settled by Kusari, their first colony established since Planet New Tokyo 51 years prior. Most of the planet's surface area is ocean; with little landmass to develop, the settlers carve out a living through fishing. Few of the species brought on the colony ship take to the new environment, and the main supply of fish comes from one species, the Redfin.
250 A.S. The Redfin is fished to complete extinction, and the fishing industry on the planet collapses. With the already poor supply of fish almost exhausted, many inhabitants decide to seek their fortunes elsewhere. A mass exodus occurs over the next 10 years, with approximately 80% of the population leaving, mostly to Planet Kyushu. A number of bold adventurers instead head to the Crow Nebula, to harvest the fuel gases there.
282 A.S Following more than two decades of extreme individual success, the major corporate players in Kusari take notice of these mining operations and begin to make their move with intent to take control of the business and force out their small competitors. The existing miners refuse to be pushed around and band together to protect their livelihood. The Gas Miners Guild is born.