Definition of "koken" []

• A black-clad person who enters the stage to rearrange the set, unremarked by the actors (noun)

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• "There is a position in the organization of the Inoue School called a koken."
• "One of the reasons the koken are important is because they are in charge of the selection of the iemoto."
• "As a koken, Mother Sakaguchi was instrumental in electing Inoue Yachio IV to her present position."