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Nishikado (西門,Nishikado) was the fifteenth generation tea master of the Nishikado tea school. He was the father of three sons, including Shoichiro and Sojiro. He regularly cheated on his wife, who knew but tolerated it. Sojiro later inherited the tea school from his father.
Xi Men's father is mentioned in episode two of Meteor Rain. His wife asks Xi Men to represent him at a meeting since he was in Hong Kong. Xi Men surmises from his mother's expression that his father was seeing his mistress.