|Title:||Bishoujo Senshi Sailor Moon Setteishiryoushuu|
|Year of Publication:||1999|
The Materials Collection (美少女戦士セーラームーン設定資料集; lit. "Pretty Soldier Sailor Moon Specification Materials Collection") was the sixth and last artbook drawn by Naoko Takeuchi, published two years after the Sailor Moon series ended. The book contained many pictures which had not been released before, including both illustrations and character design sketches.
Many of the design sketches included notes by the author which expanded on known information about the characters, as well as sketches of characters that never made it into the story (such as Diana the Moon Fairy). It also contained a short alternate-universe manga story called "Parallel Sailor Moon."