TV-Series
Description
Kankichi, younger brother to Moko (Akko's best friend), bears a full name initially documented as Kankichi Ina during the original 1962-1965 Ribon manga serialization. Later adaptations revise his surname to Kankichi Naniwa, influenced by the first anime series. His name honors Tomoko Akatsuka's father, Kankichi, reflecting familial inspiration in the series' development.

Physically, early depictions present him as a chubby elementary school boy with round facial features, "cheek beard" markings, and a singular curly cowlick, evoking resemblance to the Matsuno sextuplets from Osomatsu-kun. He typically wears striped shirts or blue sweaters. Subsequent redesigns for the 1968-1969 manga tie-in and later anime adaptations widen his face, add freckles, and replace his hairstyle with two standard cowlicks, diminishing the sextuplet likeness. By the 1988-1989 manga, his face broadens further, and he dons polygon-patterned sweaters.

Personality-wise, the original manga portrays him as mischievous yet vulnerable—feigning illness to evade school or confrontation and displaying cowardice against stronger figures. Despite this, he exhibits underlying integrity, exemplified when saving money to replace a damaged bicycle after Chikako's threat of exposure. Later adaptations, particularly the Nakayoshi manga and 1980s iterations, sharpen his demeanor into abrasiveness: he adopts crude speech, insulting Akko as "Baka-akko" and his mother as "Kusobaba," contrasting his earlier good-natured core.

His relationships recur throughout media. He harbors a persistent crush on Chikako, enduring even when Akko impersonates her to deter him through harsh treatment. Interactions with his sister Moko involve frequent scolding and physical discipline for mischief, though she protects him during genuine peril. He shares a close bond with Ganmo, often collaborating in schemes or daily activities. A crossover with Osomatsu-kun sees him bullied by the Matsuno sextuplets during a beach trip; they later apologize and befriend him after Akko, disguised as Kankichi, intervenes.

As part of Fujio Akatsuka's Star System, Kankichi appears in works like Kibimama-chan and Osomatsu-kun. These iterations sometimes alter his design and surname (e.g., Okawa in Kibimama-chan), leading to occasional treatment as distinct characters despite shared origins.

Family background includes recurring parental appearances. His mother, stern yet kind, is depicted as heavyset with glasses. His father evolves into an average salaryman resembling an older, mustachioed Kankichi. The 1969 anime specifies the father's name as Yonekichi, while the mother remains unnamed across all versions.