Born March 3. The Head Patrol Officer of Katsushika, stationed at the police box in front of Kameari Park. Hails from Asakusa, Taitō, Tokyo. "Ryo-san" is a 36-year-old police officer with the personality of a 12-year-old. His laziness at work is matched only by his zeal and cleverness in hatching money-making schemes, the fruits of which are invariably squandered on toys, gadgets, and cheap entertainment. He is the stereotypical street-smart "shitamachi" type: sporting a crew cut, stomping about in ratty sandals (even in uniform), and being narrow-minded toward the outside world, as he makes his rounds on a creaky old bicycle. At the same time, he is a super-otaku, up on all the latest fads in popular culture and consumer technology. While most of his interests are juvenile (such as videogames and collectibles), he also indulges in more typically salaryman-type pastimes such as drinking, pachinko, and gambling (especially horse-racing). Despite his undisciplined lifestyle, he possesses superhuman strength and stamina, which he is forced to depend on at times. Ryotsu is a bachelor and seems relatively uninterested in women, yet occasionally attracts the attention of naïve young female acquaintances, though never with any eventual success. He travels to Hashutsujo by his bicycle named Chidori. He has a younger brother named Kinjiro who wears glasses and runs a successful law firm. His girlfriend is Matoi Giboshi.