TV-Series
Description
Hatabou debuted as a recurring character in Osomatsu-kun, originally created by Fujio Akatsuka and his assistant Kenichiro Takai. His name, meaning "flag boy," stems from a reader-submitted contest in Shonen Sunday. The flag protruding from his head drew inspiration from a cartoon gag Akatsuka favored, where flags shot from characters' ears during moments of surprise; early designs consequently placed the flag near Hatabou's ears.

Typically appearing younger than the Matsuno sextuplets as a child, Hatabou's age fluctuated across stories, sometimes depicting him as their peer or older. His most recognizable feature is the Hinomaru (Japanese flag) on his head, though this changed contextually: becoming a communist red flag in Akahata newspaper strips, a skull-and-crossbones for his "Joe Hatabou" assassin persona, or other national flags internationally. His distinctive design features a shaggy "kappa-like" bowl cut, vertical lines under his nose representing dried mucus, and a single bucktooth. Early manga appearances showed inconsistencies like missing flags or spiral cheek marks, later standardized. The 1988 anime outfitted him in green overalls with a baby chick emblem, replacing earlier simple shirt-and-pants.

Personality-wise, Hatabou embodies simplicity and naivety, described as a "baka-type" (foolish) character. He often wanders aimlessly, lacking direction or deeper understanding. Easily manipulated or bullied by others, including the sextuplets and Chibita, he occasionally displays unexpected strength or cunning in antagonistic roles. His speech is marked by the tic "da jo" or "jo," and in the 1988 anime, he initially spoke little beyond introducing himself.

In Osomatsu-san, Hatabou appears as an adult, retaining his childlike stature and mannerisms despite being the sextuplets' age. He wears green overalls over a light-yellow hoodie and rides a tricycle, reflecting persistent immaturity. Initially portrayed as "Mr. Flag," a wealthy CEO of the Flag Corporation, this incarnation sometimes exhibited a "severe streak" during his corporate reign. The episode "Tell Us, Hatabou" sees employees revolt, criticizing his business incompetence. After losing his fortune and company, he reverts to a more innocuous, kind-hearted persona. A notable storyline implies he sells "mystery meat" from food trucks, heavily suggested to be sourced from his former employees.

His relationships vary: in Osomatsu-kun, he is frequently Chibita's follower or victim, though they occasionally become adversaries. Dekapan sometimes serves as his father or mentor, particularly in the 1988 anime. In Osomatsu-san, interactions with the main cast diminish, focusing instead on his corporate role and downfall.

Foreign adaptations renamed him creatively: Cantonese dubbed him "Sek Baan Jyu" (Grouper fish), while Spanish versions used crude epithets like "Metenabo" ("dick jammer"). Korean translations initially called him "Gong Baeg-gi" ("Interregnum") but retained "Hatabou" in Osomatsu-san.

Beyond the Osomatsu franchise, Hatabou starred in the short-lived spinoff Hatabō and Wanpei (1971–1972) and appeared in numerous other Akatsuka works, including The Genius Bakabon and Extraordinary Ataro, often in minor or revised roles.