Although Naruto has become Hokage and therefore needs to maintain some diplomacy towards other countries, it is very likely that the ninja will still feel a strong grudge against Amegakure, the rain village, that appeared in episode 157 of the anime from Boruto: Naruto Next Generations .
Why should Naruto have certain feelings about the rain village? Because that's exactly where it is His master Jiraiya was brutally killed by Pain. It currently looks like a peaceful but very poor place.
The episode shows us the arrival of Sasuke and Sai near the villageafter conquering Shojoji. The city is in terrible shape, but the last Uchiha is surprised by the amount of factories, certain equipment, and tools that are completely different and more advanced than Konoha. And it seems that the different structures don't just produce essential things.
This claim is confirmed by Jigen. The leader of the organization Kara actually said they should destroy them laboratory to keep it secret. It was this sentence that triggered something in the minds of the fans. Even if it is not exactly specified what the experiments carried out there, it is plausible to believe that this was the case the place where Amado managed to create Koji Kashin, Jiraiya clone.
At the time of death, Jiraiya's body remained in the rain village, and Amado could easily have extracted the DNA from his body and then cloned it. Remember that Boruto's anime introduced us to an unpublished member of Kara and that the manga is currently in Chapter 48.
