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Long On Japanese Entertainment Company Agency may refer to:
A search query fragment rather than a clear, single entity name; it likely refers to a specific Japanese talent/entertainment agency that includes “Long” and/or a person with “Long.”
The general concept/category of Japanese entertainment/talent agencies (“agency”) used for modeling, music, and TV/drama talent.
A performer or industry figure with the name “Long” associated with a Japanese entertainment agency; multiple real people could fit this depending on romanization/spelling.