He is chief of Narcotics Suppression Squad.

In the not so distant future, mankind has advanced to a state where complete body transplants from flesh to machine is possible. This allows for great increases in both physical and cybernetic prowess and blurring the lines between the two worlds. However, criminals can also make full use of such technology, leading to new and sometimes, very dangerous crimes. In response to such innovative new methods, the Japanese Government has established Section 9, an independently operating police unit which deals with such highly sensitive crimes. 
Led by Daisuke Aramaki and Motoko Kusanagi, Section 9 deals with such crimes over the entire social spectrum, usually with success. However, when faced with a new A level hacker nicknamed “The Laughing Man”, the team is thrown into a dangerous cat and mouse game, following the hacker’s trail as it leaves its mark on Japan. 
(Source: MyAnimeList)

In 2024, the terrorist incident known as "The Laughing Man Incident" occurred in which Ernest Serano, president of the groundbreaking micromachine company, Sereno Genomics, was kidnapped and ransomed. One day, the case having remained unsolved for six years, Detective Yamaguchi, who has been investigating "The Laughing Man Incident," sends word that he wants to meet with Togusa from Public Safety Section 9. However, soon after sending this message, Yamaguchi, crucial to the success of the case, dies in an accident. Many days pass and in the midst of a police interview relay concerning suspicions behind interceptors, a forewarning is received from "The Laughing Man" of his next crime. The incorporeal hacker begins to move once again.
 
(Source: Anime News Network)

Niimi