Terminal High Altitude Area Defense (THAAD) is an American anti-missile system designed to shoot down short, medium, and intermediate-range ballistic missiles in their terminal phase. It is one of the most advanced missile defense systems in the world and has been in the news due to its deployment in various regions as a measure of strategic defense.

The THAAD system consists of a truck-mounted launcher, a complement of interceptor missiles, and a radar system that can detect and track incoming missiles. The system is designed to destroy incoming missiles by colliding with them in mid-air, using a kinetic energy impact.

The system has been deployed in several countries as part of the United States` strategic defense policy, including South Korea, Guam, and Israel. Its deployment in South Korea, in particular, has been a controversial issue, with North Korea opposing it and China expressing concerns over its potential impact on regional security.

India also has its own indigenous anti-missile program, called the Ballistic Missile Defense (BMD) system, which is designed to intercept and destroy incoming missiles at altitudes of up to 150 kilometers. While both systems share similar objectives, they are developed independently and have different technical specifications.

In conclusion, Terminal High Altitude Area Defense (THAAD) is an American anti-missile system that has been in the news due to its deployment in various regions for strategic defense purposes. It is not an Israeli radar system, India`s indigenous anti-missile program, or a defense collaboration between Japan and South Korea.