Board Thread:Naruto Discussions/@comment-26636534-20160527151459/@comment-734582-20160601103340

Namikazenaruto9 wrote: How many world map show river lakes etc?they only show sea,ocean and lands.so if there was a sea near amegakure they should have shown it. It isn't a sea anymore, but if you looked on a world map and pressed your eyes against the paper 100 years ago, you couldn't see the Zuiderzee if you tried.

As for practical matters, the deepest dives have all been in the order of a few hundred meters. Assuming that in Naruto we replace sophisticated diving equipment with jutsu, 610 meters is still about the max. Practically however 300 meters is the limit. This is nothing compared to kilometers deep water in oceans.

Crater Lake (america) is about 600 meters deep (mean depth 300m), and 53 square kilometers. Judging from the manga's lake size and the comments here, this lake would fit the rough size requirements, and yet also the depth requirements. If jiraiya was killed on lake Crater, the average diver can't get to him. Expert divers with extremely specialized equipment may just be able to. If Lake Amegakure is slightly deeper than this, Jiraiya's out of reach.