Koichi Adachi (足立 宏一, Adachi Kōichi) is a character in Yakuza: Like a Dragon.
Adachi appears as a somewhat knowledgeable person, as his past career enables him to get the grips of the criminal underworld. Being a former police officer, he's able to piece together informations that the party receive to form a solid hypothesis. However, on the flip side, he's terrible with money, as he admits to spend it on drinks and women.
Adachi has a heavy build and greying, slicked back hair. He wears a blue bomber jacket over white T-shirt, a pair of fingerless leather gloves, khaki pants, and a pair of lace-up sneakers.
Adachi was originally a police officer in Kanagawa Prefecture, however, he was unreasonably demoted by Juro Horinouchi to the DMV and began work as driving instructor. After helping Ichiban crash an Omi Alliance meeting in order to see his former patriarch, Adachi was fired from the department, robbing him of his pension just a short while before he had planned to retire.
Yakuza: Like a Dragon
Being a former detective with years of experience under his belt, Adachi is well-versed in all manner close-quarters fighting. His "Detective" job has him use a makeshift police baton in combat which can double as a club. He can easily disarm people from their weapons in one fell swoop. Being the party member with highest health and defense next to Kasuga, Adachi naturally falls into the role of the resident tank of the party. Adachi has skills that can also inflict "Rage" on his opponents, which allows him to influence enemy aggro towards himself to keep his fellow party members safe.
- Adachi shares his Japanese voice, Akio Ōtsuka, with Ryuzo Tamiya from Yakuza 3.
- Adachi is the second playable character who served the police force, the first being Masayoshi Tanimura