Question: The Lords of the Akō Domain in Harima Province associated with the story of what 18th-century historical event in Japan in which a band of "rōnin" (leaderless samurai) avenged the death of their master?
Sentence (from "Forty-seven rōnin"): The revenge of the forty-seven "rōnin" (四十七士 , Yon-jū-shichi-shi , forty-seven samurai) , also known as the Akō incident (赤穂事件 , Akō jiken ) or "Akō vendetta", is an 18th-century historical event in Japan in which a band of "rōnin" (leaderless samurai) avenged the death of their master.
Relevant evidence: Yes