Ji rikknit was an addictive substance produced from rikknit creatures native to New Plympto. For many years, the native Nosaurians harvested ovum sacks from the tree-dwelling rikknit and processed them into ji rikknit. When New Plympto fell under Imperial oppression, a facility on Karsten Moon was established, where corporate scientists conducted experiments to synthesize ji rikknit from a few captive rikknit species, though their best result was an inferior narcotic with harmful side effects.