A young, handsome patrol cop who serves as Ryo's comic foil. While holding down a day job in the police box in front of Kameari Park, Nakagawa is the son of Nakagawa Zaibatsu, and often has to zip off to board meetings in his exotic sports cars and private helicopters. He is quite handsome, an expert driver and marksman, and popular with all the lady cops. However, as a rich heir, he is also quite naive to the ways of the world. His policeman's uniform is an ¥300,000 yellow pinstripe suit made by Pierre Cardin. Though constantly surrounded by beautiful women throughout his duties, Nakagawa appears indifferent and his tendencies are somewhat ambiguous. He hates natto and his favorite car is his Ferrari.

(Source: Wikipedia)

Ryoutsu, being an underpayed policeman, is always coming up with ways to make some quick money. But in the end, his plans which are ridiculous from the beginning always go wrong and land him in big trouble with the Buchou. 

__Non-Anime Roles:__

- Aestivum Svafrlam Forden - Metaphor: ReFantazio (VG)

The typical Kochikame plot involves Ryo-san coming up with a money-making scheme by inventing a new gadget or capitalizing on a fad, achieving great success, calling on Nakagawa's help as things turn sour, and finally losing it all as the fad runs out of steam or out of control. While the plots are gag-driven, much of the humor comes from the juxtaposition of mundane characters with the bizarrely incongruous (Nakagawa's wealth, Maria's appeal, everyone's lack of actual police work), most of which is never explained or rationalized in the slightest. 
(Source: Wikipedia) 
Notes: 
-Volume 201 got published on October 4, 2021. 
-Included one-shot: Robot Santapei.

“ANIMATION × PARALYMPIC: Who Is Your Hero?” is a special series featuring fictional Paralympic athletes depicted in world-renowned Japanese animation. The project aims to introduce new Paralympic sports heroes through attractive characters and stories that will be created by the collaboration of famous comic creators and animation film directors. The series will increase the number of featured sports by 2020. 

An episode animated by Kyoto Animation was scheduled to be broadcast in August 2019, but was later announced to be cancelled after it was determined production could not be completed in time for the 2020 Paralympic Games due to a tragic arson attack on the studio.

The wicked multi-billionaire, Shinatora, builds wretched, ugly buildings. The explosives genius calling himself Benten has targeted Shinatora's empire and begins to destroy the monstrosities that are wiping out whole sections of downtown Tokyo. In cooperation with the local police force, the FBI has sent Lisa Hoshino, a bomb disposal expert, and her robot assistant, Dandy, on a lecture tour of Japan. Ryotsu is reluctantly paired with Lisa to protect the people of the Kameari district. Why does Benten only target Shinatora's buildings? What is his next target? 
Another email warning arrives at the Katsushika Police Station. Benten's next target is the newly built, gigantic amusement park, Shinatora World. Lisa and Ryotsu hurry to the scene. What they find is a huge Soviet-era rocket armed with a massive bomb powerful enough to obliterate the entire area of Katsushika. 
What can Ryotsu do? 
(Source: AniDB)

A one shot published in WSJ issue17, 2025 to commemorate the opening of the Kochikame Memorial Museum

A Kochikame one-shot published in WSJ issue 3/4, 2021

A Kochikame one shot published in WSJ issue 33-34, 2021

A KochiKame one shot published in WSJ issue 36-37, 2024 

A KochiKame One Shot published in WSJ issue 36-37 2022

Keiichi Nakagawa