Mack Shinozuka is a character in the Yakuza series. He is a former track star turned professional photographer, and later owner of a photojournalism website called MacSiv.
Shinozuka's passion for photography led him to search the world for the "perfect shot." This in turn prompted him to visit Japan, his ancestral home, where he got into a relationship with a Japanese woman.
Shinozuka first meets Kazuma Kiryu in Downtown Ryukyu, where he introduces Kiryu to Revelations. After Kiryu has obtained all the revelations, Shinozuka appears in the construction site at West Park as the Chase Training instructor.
Akiyama encountered him at the rooftops of Kamurocho. Encountering him enables Akiyama to take certain photos at certain spots and obtain Revelation by e-mailing them to Mack.
Kiryu and Mack meet again in Nagasugai when Kiryu agrees to take over the rest of Mack's taxi ride in Wada's place. During the ride, Mack reminds Kiryu about Perfect Shots & Revelations which are then available afterwards. Mack also sends emails to Saejima, Haruka, Akiyama and Shinada about sharing their Revelations on his website called MacSiv.