[🅢🅗🅘🅝🅣🅐🅡🅞 🅨🅐🅜🅐🅩🅐🅚🅘]

The vice president of the Yamazaki Syndicate. He was the mastermind behind the birth of Shingen Yamazaki's children (including Gun Park) in order to produce forces for the next generation following the Syndicate's defeat against Kim Gapryong's Group. He was originally Shingen Yamazaki's older brother, who was meant to be the head of the clan, but did not become one due to the midwife's plan.

Shintaro Yamazaki is seen as a tall and thin but muscular man, he has fair skin like Shingen, he has a jet black slicked back hair style similar to Gun's, he has broad shoulders, he is very handsome, he has features like Shingen. He also has tiger tattoos, except that they do not cover his chest and part of his torso, but rather his sides and arms and even his legs.

He is usually seen wearing a white kimono and a white haori with a black crest of the Yamazaki symbol, he also wears light grey Hakama pants, white tabi socks and white geta clogs and is usually seen with a black fan that he holds or tucks into the waist area of ​​his Hakama pants.

Shintaro himself is known to be exceptionally intelligent and capable, to the point that many in the Yamazaki Syndicate believe that he should be their leader. However, Shintaro is a staunch believer in the rules and traditions of the Yamazaki Syndicate to a fanatical degree. As shown, Shintaro is extremely devoted to his twin brother Shingen. Having brutally rejected the offer from the three Branch Family Heads of the Yamazaki Syndicate to become the new head of the clan due to his brother's lethargy and proceeded to brutally execute them for betraying the traditions of the syndicate. While acknowledging that his brother's lethargy is detrimental to the organization as a whole and that him taking over the syndicate would benefit and restore the syndicate to its former glory, Shintaro nonetheless continues to insist on following the rules of the syndicate despite the group's degradation and weakening as a whole.

A serious man who places the rules of the Yamazaki Clan above all else, even ordering a young Gun Park to kill his son for discouraging him from becoming the next Clan Head. As noted by the branch family leaders whom he executed, ordering the death of his own son had a deeper psychological effect on Shintaro than he initially believes and he may feel subconscious remorse for having done so and has led him to become fanatical in following the traditions and rules of the Syndicate. Later, upon learning the truth about his birth, he completely mentally breaks down and kills Shingen to become the head of the family.