Arc 1A World Across the Rift
Obito, Kakashi, and Nagato entered a parallel Shinobi World to assess it and prepare a path for the Empire, but they found poverty, political abuse, and a broken mission system. The group became entangled with Team 7 and Zabuza while Nagato traveled toward the Land of Fire’s capital, and the arc ended with Kakashi confronting Zabuza’s Water Clone.
- Uchiha Senju sent Obito Uchiha, Kakashi Hatake, and Nagato Uzumaki through the teleportation array, and they arrived at the Valley of the End in another world.
- Nagato investigated the famine in the Land of Rivers and questioned the world’s leaders, while Jiraiya persuaded him to visit the Land of Fire before judging it.
- Obito and Kakashi encountered Naruto, Sakura, and Sasuke, and Obito fought the parallel Kakashi before revealing that the two Kakashis were counterparts.
- Obito learned that his counterpart had died young, that Sasuke’s brother Itachi had massacred the Uchiha Clan, and that the Senju and Uzumaki clans had been wiped out.
- Nagato saw civilians suffer under the Land of Fire’s system, revived the dead with a modified Impure World Reincarnation, and continued toward the capital with Jiraiya.
- Obito accepted Sasuke as his disciple, sealed his speech, and taught him the Empire Uchiha Body Refinement Technique while promising future study in the Empire.
- Obito and Kakashi challenged the shinobi mission system and agreed to help Tazuna by taking down Gato, while Obito sealed Naruto’s Chakra after Naruto attacked them.
- Zabuza trapped the group in the Hidden Mist Technique, and Kakashi dispersed the mist and struck a Zabuza who turned out to be a Water Clone.