
Wako is a Japanese translation of the Chinese word Wokou. The first mention of a Wako clan was when Fujiwara Sumitomo a powerful diamyo [baron] got sent to destroy the first pirate clan known on orders from the emperor because it was swelling in size and posed a threat to eastern Japan in the mid 900s. When he killed the leader of the clan the pirates said that he was the new leader, he accepted and invaded eastern Japan. By then another pirate clan had formed and Fujiwara died fighting them. Afterwards an official from the imperial court fought the remainder of both pirate clans on a windy day so the wall of shields the pirates erected blew down. Both of the early pirates clans were wiped out but other Wako clans continued all the way into the early 1600s.