Mount Myōboku

Myobokuzan is the land of frogs, the place where all the frogs that Naruto, Minato or Jiraiya have summoned, live. It is home for huge and small frogs alike. For a human to get to Myobokuzan, a frog has to use Reverse Summoning Technique, but Pain hints, after learning that Naruto was in Myobokuzan, that he would be able to get there as well.

Myobokuzan is a rich and beautiful land, whose ultimate authority seems to be the Toad Sage. Shima and Fukasaku are both elders and sages, and they seem to have an even higher authority than Gamabunta itself. There are many statues of the frog ancestors, which indicates that their culture pays them a lot of respect.

Some of the inhabitants of Myobokuzan can use Senjutsu. That is, to gather natural energy. There's a sacred fountain in Myobokuzan where a special oil makes it easier for people to feel the natural energy, but if the person is not perfectly still and becomes one with nature, he or she starts becoming a frog.

The List
Myobokuzan has records of its population in a list, and the name of a Myobokuzan frog stays there until it dies.