The Johari window was created by two American psychologists, Joseph Luft (1916–2014) and Harrington Ingham (1914–1995) in 1955 and is a technique used to help people better understand their relationship with themselves as well as others. [Luft, J. Ingham, H. (1955)]. This technique is to help people know (first of all) themselves better and after that, helps know each other better and this improves the relationship between two persons. Johari window can make you improve your personality. This technique can be between one person (you) and another person or a group of persons (the others). First of all, let’s talk about how Johari window works and what are the four areas that Johari window has. The first area is the open area. In this open area