Jutsu (術, or じゅつ) is a term used in Japanese martial arts and anime/manga to refer to techniques or abilities that are used to accomplish a specific task. These can range from simple physical maneuvers, such as strikes and throws, to more complex abilities, such as summoning animals or controlling elements like fire or water.
In the world of anime and manga, jutsu are often associated with the ninja and samurai, and are typically depicted as being unique to individual characters. The use of jutsu is often a defining feature of these characters, and it is common for them to have a wide variety of jutsu at their disposal, each with its own unique properties and effects.
Jutsu are also often categorized by the type of energy that is used to perform them, such as chakra in the Naruto franchise, or ki in Dragon Ball.
In real world martial arts, Jutsu means techniques and methods, some of those techniques could be common and shared between different styles, while others are specific and unique to a certain school or ryu (ryuha). Jutsu are usually trained in kata or forms, usually with a partner, that simulates a real fight scenario.
Overall, jutsu is a term with a long history and rich cultural heritage, and it continues to be an important part of Japanese martial arts and popular culture today.