Ji'in, Jion, and Jitte form a group of kata used in Shotokan, Shorin-ryu (Seiyo Kai), and other karate styles, beginning with the same characteristic kamae of the left hand covering the right, which apparently has roots in ancient Chinese boxing . Their origin is thought to be from the Tomari-te school, however Hirokazu Kanazawa speculates that the Jion kata were devised in the Jionji 慈恩寺, the Jion temple, where martial arts were famously practiced. From there, Kanazawa believes the Jion kata were spread into the Tomari region.

Ji'in 慈陰("Inverted Mercy") is important for the execution of many simultaneous techniques and the often-repeated stances, enabling swift changes of direction while maintaining balance, power and steps of equal length. It has, however, been removed from the Japan Karate Association teaching and grading syllabus.

Jion 慈恩 ("Mercy") is a representative kata in the Shotokan system because of the importance of the perfection of the basic stances it contains, notably zenkutsu dachi (front stance) and kiba dachi (horse stance). Also practiced in some Shito Ryu organizations, emphasis is also placed on kokutsu dachi, the kata is noticeably shorter than its Shotokan counterpart.

Luca Valdesi (born June 18, 1976, in Palermo, Italy) is a Karate world champion in both Team and Individual Kata events. Valdesi began his study of Karate at age six, under the guidance of his father Andrea, at several city gyms.

In 1995 Valdesi joined the prestigious Karate team of the Fiamme Gialle (the Italian Financial Police). National call-ups began immediately for Valdesi. Soon after the national call-ups, the first international wins arrived, initially with the Karate team of the Fiamme Gialle. Soon after, Valdesi began winning events as an individual. Valdesi has been winning the Italian Individual Championship since 1995 and the European Senior Championship since 2000.

Valdesi is trained by the general coach of the Fiamme Gialle Karate Team, Claudio Culasso and by the general coach of the FIJLKAM National Team, Professor Pierluigi Aschieri, as well as his father, who looks after Valdesi during training sessions and at competitions.

In spite of demanding Karate engagements, Valdesi has managed to pursue a life outside of Karate. In 2001, Valdesi married dancer, Ada Spinella. In February 2004, Valdesi's son, Andrea was born. In November of the same year, Valdesi completed a degree in business economics, asserting his success to the support from his family.