Rokugan
The setting briefly touches upon many of the different cultures that occupy the same world. This world is the foundation for the Legend of the Five Rings Collectible Card Game, the Legend of the Five Rings Role-Playing Game, the Clan Wars miniatures game, and a series of novels. Legend of the Five Rings was also the "featured campaign setting" of the Oriental Adventures expansion to the third edition of Dungeons & Dragons, but this book and the line of L5R material based upon it is now out of print.
Campaigns
The Nine Riders of Rokugan
Legend of the Five Rings 5th Edition
War is Coming, Who Will Survive