This small museum, designed mostly for kids, covers the history of animation in Japan and its digital future. Temporary exhibits sometimes show cell art from major animators; there are also light tables (where you can practise drawing) and a manga and anime library.
Take any bus from stand No 0 or 1 outside the north exit of Ogikubō Station to Ogikubō Keisastsusho-mae (five minutes, ¥210). Double back to the traffic light and turn right.