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.

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. 

To celebrate the 40th anniversary of the manga a new TV anime project has been announced.

Contains five crossover one-shots with other series.
 
1. Sousha no Kyuujitsu (Crossover with Golgo 13) 
2. Ryoutsu Kankichi VS Lupin III (Crossover with Lupin III) 
3. Seigi Choujin Kameari Dai Shuuketsu!! no Maki (Crossover with Kinnikuman) 
4. Kochira Namekkusei Dragon Kouenmae Hashutsujo (Crossover with Dragon Ball) 
5. Ryoutsu VS Shuuryou Patchi!!: J Gag All Stars Katsushika Dai Soudou!! (Crossover with Pyuu to Fuku! Jaguar, Bobobo-bo Bo-bobo, Taizou Mote King Saga, Maison de Penguin)

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

A One Shot of KochiKame Published in WSJ issue 32, 2023

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

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

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