Tachi waza

In hand-to-hand combat, grappling is a close fighting technique used to gain a physical advantage such as improving relative position, or causing injury to the opponent. Grappling covers techniques used in many disciplines, styles and martial arts that are practiced both as combat sports and for self-defense.

Grappling most commonly does not include striking or the use of weapons. However, some fighting styles or martial arts known especially for their grappling techniques teach tactics that include strikes and weapons either alongside grappling or combined with it.

Grappling techniques can be broadly subdivided into Clinch fighting; Takedowns and Throws; Submission holds and Pinning or Controlling Techniques; and Sweeps, Reversals, Turnovers, and Escapes.

The degree to which grappling is utilized in different fighting systems varies. Some systems, such as amateur wrestling, Pehlwani, Pehlwani submission wrestling, judo, sumo, and Brazilian jiu-jitsu are exclusively grappling arts and do not allow striking. Many combat sports, such as shooto and mixed martial arts competitions use grappling while retaining striking as part of the sport

Grappling is not allowed in some martial arts and combat sports, usually for the sake of focusing on other aspects of combat such as punching, kicking or mêlée weapons. Opponents in these types of matches, however, still grapple with each other occasionally when fatigued or in pain; when this occurs, the referee will step in and restart the match, sometimes giving a warning to one or both of the fighters. Examples of these include boxing, kickboxing, taekwondo, karate, and fencing. While prolonged grappling in muay Thai will result in a separation of the competitors, the art extensively uses the clinch hold known as a double collar tie.

...
Wikipedia