Text: Halfway back along Kyushu's west coast, Kumamoto is an old castle town that was of considerable importance to the Tokugawa shoguns as a counterweight to the presence of the annoyingly independent Shimazu clan down in Kagoshima.
Entailment: In Kagoshima, there is an independent clan called Shimazu.
Contradiction: The Shimazu clan is situated in Miyatana.