This is self-published expansion kit for Kyushu Sangokushi. Ryukyu is old name of Okinawa islands, and "Wind of Ryukyu" is title of a Japanese historical fiction television series. Covering battles in Okinawa island. Two scenarios are included in this kit. Each players control one or more clans. The clan's combat units is organized to some troops. The game repeats the game turn decided by the scenario. There are four action stages in each game turn. The number of stages where each troop can act is decided by commander's activation ability. In the action stage, each troop selects one action. The action that can be selected is a movement, field combat, siege, moral recovery, reorganization and replacement. Victor is determined by the capture or defend of the castle given scenario. Also need to play Standard rule (Late version), Reference card and some markers from Kyushu Sangokushi.