KochiKame: Tokyo Beat Cops

Kochikame (こち亀), full title Kochira Katsushika-ku Kameari Kōen Mae Hashutsujo (こちら葛飾区亀有公園前派出所, literally, "This is the police station in front of Kameari Park in Katsushika Ward"), is a long-running comedy manga by Osamu Akimoto. It has been continuously serialized in Weekly Shōnen Jump since September 1976, with over 1700 chapters published, making it the longest-running manga series in history (Golgo 13 and Doraemon began publication earlier, but neither has been in continuous serialization). As of volume 170 the series has sold over 135 million copies.

The manga has been adapted as an anime series, produced by Studio Gallop, which was broadcast across Japan by the anime satellite television network Animax, and Fuji Television, and two animated movies, a live-action movie, several stage adaptations, and a live-action television series.

Plot
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 combination of mundane characters with the bizarrely out of place characters as Nakagawa who has wealth and Maria who has appeal. What they have in common is everyone's lack of actual police work, most of which is never explained or rationalized in the slightest. (It is explained in Jump that Ryo-san is one of the best officers in catching criminals.) Reiko and Nakagawa have special licenses from police headquarters because of their skills in linguistics.