The Spare Key Project (合鍵計画 (あいかぎけいかく) Aikagi Keikaku?, lit. Project of Duplicate Keys) is a project to intentionally create the keys that will open both Pandora's Box and Mandala's Box. Furuta was a scientist that worked to Ususama School in this project.[1]


  1. Samurai Eight: Hachimaruden Manga; Chapter 13, page 18

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