Training Cave

The Training Cave ( 修練の洞窟 , Shūren no Dōkutsu ) is a location in an undisclosed area previously used by the Akatsuki . Most of its structures are built into a mountain side, and at its entrance stands an elaborate torrii with a bridge over a small lake. It was here that Tobi alongside Zetsu carried out the test for the Limited Tsukuyomi : a prototype for the Infinite Tsukuyomi. After Tobi used the Telescope Technique to uncover what was in Naruto Uzumaki 's heart, he and the other " Akatsuki members " now begin the Limited Tsukuyomi experiment.

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