A professional shogi player is a shogi player who is usually a member of a professional guild of shogi players.
Professional shogi players, Yoshiharu Habu and Akira Watanabe, in 2014 with women's professional player Aya Fujita as timekeeper and (former) apprentice professional Naoto Kawasaki as game recorder
Professional shogi players at a human shogi [ja] exhibition match in Himeji, Japan in 2018. From left to right: Toshiaki Kubo, Keita Inoue, Masakazu Wakamatsu, Tetsurō Itodani, Akira Inaba, Shinobu Iwane, and Rei Takedomi.
Professional shogi players Hiroyuki Miura, Rieko Yauchi (Women's professional), Takeshi Fujii and Yoshiharu Habu (from left to right) in 2013.
Women's professionals Momoko Katō 3-dan (left) and Sae Itō 2-dan (right)
The dan ranking system is used by many Japanese, Okinawan, Korean, and other martial arts organizations to indicate the level of a person's ability within a given system. Used as a ranking system to quantify skill level in a specific domain, it was originally used at a Go school during the Edo period. It is now also used in most modern Japanese fine and martial arts.
Shogi
Diploma of 7th dan in Japanese kendo
Black belt, wadō-ryū karate
Some Korean martial art schools use embroidered bars to denote different dan ranks, as shown on the 1st, 2nd, and 3rd dan belts above.