"Senjutsu (仙術?, lit. "sage techniques") is a form of jutsu introduced during Part II of the series. It is achieved by combining the user's chakra with "natures energy", a task that can only be completed by ninja with particularly large chakra reserves who learn to harmonize with nature by remaining perfectly still — anyone else who tries is quickly overwhelmed by this natural energy, turning into a giant stone toad statue, though these statues are greatly respected. However, the master sage toad can neutralize the effects with his beating stick. Once senjutsu has been mastered, the user can perform jutsu with much greater power and effectiveness. The user also has the ability to mold the natural energy around their opponents, allowing them to increase the range of physical attacks to the extent of not even having to touch the opponent directly to inflict damage. As a beneficial side effect, senjutsu makes the user stronger as time passes rather than tiring them, as it is sourced in energy outside the body rather than the purely internal chakra of normal Jutsu. The state of harmony gained during its use also grants an expanded awareness, allowing its user to detect the presence, or absence, of familiar chakras. Senjutsu appears to be unique to the summoned toads in the series, as only they and their human students — Jiraiya and Naruto Uzumaki — have been seen using it, although recent manga reveals that Kabuto has also achieved Senjutsu with the Snake Sage, which implies that all summoned beasts have a Senjutsu form.[15]"
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