Takeshi Seyama (瀬山 武司 Seyama Takeshi, born in 1944) is a Japanese film editor from Tokyo.
Seyama is the editor of many anime series and movies from Studio Ghibli, Katsuhiro Otomo, and Satoshi Kon, including hits such as Princess Mononoke, Steamboy, and Paprika. In 1992, Seyama founded the "Seyama Editing Room," which specializes in editing anime. He has also taken part in editing the 1988 anime Grave of the Fireflies and My Neighbor Totoro
