Rokugan

Rokugan is the fictional empire which is the main power in the Legend of the Five Rings setting, the basis for the Legend of the Five Rings Collectible Card Game, Legend of the Five Rings Role-Playing Game, the board game Art of War and the now out of print Clan War Miniatures game, all from Alderac Entertainment Group. It is similar to feudal Japan, though it also includes aspects of other Asian cultures, as well as magic and mythical beasts. The setting was used by Wizards of the Coast as the basis for their updated Oriental Adventures Dungeons & Dragons supplement.

There is no given name for the entire world which the setting describes, so "Rokugan" is used alternately to refer to the specific nation within the setting or to refer to the entire world. Strictly speaking this is incorrect, but as the Emperor lays claim to all that is as a right of being the descendant of Amaterasu (Lady Sun) and Onnotangu (Lord Moon), the courtiers of the Emerald Empire would see this as an appropriate use. The citizens and rulers of the Burning Sands and Ivory Kingdoms might disagree, however. Some say that Ningen-Do, the name of the metaphysical realm in which the world is placed, serves as a proper name for the world.

Wizards of the Coast opted to let Alderac Entertainment Group (AEG) continue publishing second-edition material for the Legend of the Five Rings Roleplaying Game system, and was simultaneously working on a d20 campaign setting book for the world of Rokugan; in October 2001, Wizards finally produced the setting book they had had in process for over a year: James Wyatt's Oriental Adventures (2001), which offered new d20 rules for Oriental realms, some of them specific to the world of Rokugan. After that, all of the Legend of the Five Rings rights went back to AEG, who immediately began supplementing Wizards' Oriental Adventures with the Rokugan Oriental Adventures Campaign Setting (2001), which came out just two months after Oriental Adventures, in December 2001; two more d20 books followed over the next couple of months, Creatures of Rokugan (2002) and Magic of Rokugan (2002).

...
Wikipedia