Nihon Ad Systems

Nihon Ad Systems, Inc. (（株）かぶしきがいしゃ日本にほんアドシステムズ Kabushiki-gaisha Nihon Ado Shisutemuzu), NAS for short, is a Japanese anime production and character merchandising company. It, along with Studio Gallop, produced the Yu-Gi-Oh!second series anime.