L5R LCG: Tears Of Amaterasu Expansion Pack - Rules of Play says:

Expand your Legend of the Five Rings: The Card Game collection with Tears of Amaterasu, the first Dynasty Pack of the Imperial Cycle! As the first Dynasty Pack in Legend of the Five Rings: The Card Game, Tears of Amaterasu features three copies of twenty new cards and expands on the theme found in the Core Set of the game. Offering new tools for all seven clans as well as new neutral cards to supplement any deck, Tears of Amaterasu is the perfect next step for Legend of the Five Rings: The Card Game.