Hanoi Project

The Hanoi Project, also known as the Lost Incident, was an event that occurred 10 years prior to the current timeline of the Yu-Gi-Oh! VRAINS anime.

History
10 years before the present timeline, six children were kidnapped by a certain organization and went missing one-by-one. During those six months of captivity, the children were imprisoned separately in rooms with nothing but a VR equipment. They were forced to Duel in a virtual arena, and if they did not win, they were not allowed to eat.

After the children were rescued, the incident was covered up. In the aftermath of the incident, several of the children suffered from post-traumatic stress disorder, with some taking years of therapy to recover, while others have not recovered at all.

Victims

 * Yusaku Fujiki
 * Shoichi's brother