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The Dive Inspection (ダイブインスペクション Daibu Insupekushon?) was the ultimate goal of the Best Man Project, where scientists and other experts attempted to create a perfect, immortal human. Using Priest Yakusugi as a test subject, they attempted to rewrite his DNA to cause his cells to reproduce infinitely, effectively making him immortal. However, something went wrong during the experiment, and many people present were killed. Unknown to the participants, their experiment resulted in the creation of the destructive being known as Kankel.