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The '''Hanoi Project''' (ハノイプロジェクト ''Hanoi Purojekuto''), also known as the '''Lost Incident''' (ロスト{{Ruby|事|じ}}{{Ruby|件|けん}} ''Rosuto Jiken''), is an event that occurred 10 years prior to the start of the ''[[Yu-Gi-Oh! VRAINS]]'' anime.<ref name="ep19">{{episode|Yu-Gi-Oh! VRAINS|19|ref}}</ref> [[Kiyoshi Kogami]], a researcher at [[SOL Technologies]], developed and executed the incident without the knowledge of his company.<ref name="ep20">{{episode|Yu-Gi-Oh! VRAINS|20|ref}}</ref>