Why Naruto trains at Mount Myoboku
Naruto’s Sage Mode training at Mount Myoboku centres on gathering natural energy, controlling it and then using it in combat. The mountain is the home of the toads, with Fukasaku and Shima among its elders. It provides the setting for supervised practice, rather than a shortcut that removes the need to learn control.
This guide follows that particular training process. For the wider energy system and the distinction between ordinary chakra and senjutsu chakra, see how Sage Mode works. The lessons Naruto follows should not be assumed to describe every sage’s training.
Stillness first, then combat
Fukasaku’s first task is for Naruto to remain still. The official synopsis of The First Challenge makes this the starting point and notes that gathering nature energy takes time. Learning to gather it and finding an opportunity to do so during battle are therefore separate problems.
The official Two Saviors recap describes the same first lesson and warns that those who fail to control the required nature energy are permanently transformed into stone frogs. Supervised practice does not make a mistake harmless or remove the need for control.
That recap then places Frog Kumite after Naruto learns to take in nature energy. The sequence is the point: handle the energy before applying it in a fighting method. Training aids used at the mountain are part of that supervised setting; this guide does not treat them as a portable combat supply Naruto can carry into a fight to replace the skill.
From gathering energy to Frog Kata
Frog Kata, also rendered Frog Kumite in the official recap, uses the natural energy around the user to extend the reach of close-combat strikes. An apparently missed punch can therefore connect. That is an application of natural energy around the body, rather than an ordinary extension of the fist itself.
The useful distinction is between learning to gather energy and learning to fight with it. Frog Kata belongs to the latter part of Naruto’s training. It gives his strikes a reach that an opponent may misjudge, without establishing that every defence can be bypassed.
Why Naruto uses shadow clones
Fukasaku and Shima can fuse with a user and gather energy for them, helping Jiraiya. Kurama rejects Fukasaku’s attempted fusion with Naruto, so that workaround is unavailable to him.
Naruto uses shadow clones instead. The official Two Saviors recap describes him calling a shadow clone from Mount Myoboku to restore Sage Mode during the Pain confrontation. The clones help replenish the state while the original Naruto fights. They do not replace the stillness and control he learned at the mountain.