"Bishoujo Senshi Sailormoon" was created by Naoko Takeuchi and is owned by her, Kodansha Comics, and Toei Animation. It was lisenced for English language translation and North American distribution by DiC Entertainment and CWI.
"The Sailor Moon Role-Playing Game" and the TriStat system were created by and are owned by Guardians of Order.
This expanison was made by a fan for fans, and may be distributed freely. However, it may NOT be sold for profit under any circumstances and MUST be distributed completely intact, with legal disclaimers.
Also, check out my page. It seems to have spawned a monster.
http://www.oocities.org/rabbi-tucker/ronin/senshi.html