Nihon Ad Systems, Inc. (株式会社日本アドシステムズ Kabushiki-gaisha Nihon Ado Shisutemuzu), NAS for short, is a Japanese anime production and character merchandising company, a wholly owned subsidiary of the advertising agency Asatsu-DK. The "Ad" in its title is an abbreviation for "Animation Development". Along with animation studios Sunrise, Toei Animation and TMS Entertainment, it is co-founder and shareholder of the Japanese anime television network Animax. It has its headquarters in Tsukiji, Chūō, Tokyo.
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