Detective Tanaka Kazuki

 is one of the characters in the game Tokyo Dark. A fellow detective in the Tokyo Metropolitan Police Department. He has a strong relationship with Detective Ito who he works with on most cases. Early in the game, Tanaka uncovers important information on a case he had been working on for quite a while. Neglecting to involve Ito heavily, he attempts to finish it himself but ends up in major problems.

Detective Tanaka has a very strong sense of duty and determination towards his cases, though he also has a very affectionate side as experienced with interactions between him and Ito.