TV-Series
Description
Unagi-Inu, meaning "Eel-Dog," originates from Fujio Akatsuka's works, primarily "The Genius Bakabon." His creation occurred during a brainstorming session at Fujio Pro under unusual circumstances involving a broken air conditioner, leading to delirium-induced ideas about an eel shop. Two conflicting origin accounts exist: one attributes his conception to editor Takao Igarashi and artist Kunio Nagatani, inspired by a hallucinating police officer mistaking a dog for an eel. The other credits Akatsuka directly after observing a dog resembling an eel outside a window.

Physically, Unagi-Inu is a hybrid of a dog and an eel. He has a long, slender body with an eel-like tail and fins, combined with a dog's head and legs. His typical coloration is black with a white underbelly, pink lips, and white or blue tail fins. Due to visual sensitivities, some merchandise depicts him in alternative colors like bright blue, notably in the 1975 anime for ink conservation and clarity.

His personality is polite and laid-back. He frequently uses honorifics and appends barks like "wan wan" (woof woof) to his sentences. A core aspect involves evading consumption, especially by the Police Officer with the Connected Eyes who craves eel meat. He often serves as an observer, commentator, or a "straight man" in comedic interactions.

Family is significant. His mother is an ordinary eel residing in a special aquatic home section, deceased in later timelines. His father is an ordinary dog. Apocryphal family includes an older sister, Unagi-Inue, who sells cosmetics, married a frog named Korgenkowa, and has a daughter named Unakowa. A younger sister, Unagi-Inuko, is a nurse. A white female counterpart appears in certain adaptations, potentially linked romantically. He has offspring, including a daughter desiring to marry a human in one series and a son named Inu-Unagi, who inverts his appearance with a dog's body and an eel's head.

His narrative evolved across appearances. Initially a disposable one-shot character grilled and eaten in his debut, unexpected popularity led to his reintroduction as a recurring figure actively avoiding being eaten. This allowed expanded roles like dispensing advice or reacting to incidents. Later adaptations feature him in introductory segments delivering safety warnings.

Appearances extend beyond the core series into numerous other Akatsuka works, animation adaptations, and media like pachinko games. His animated roles vary from background presence to spotlight episodes, with adaptations sometimes altering his fate, such as surviving a grilling with only his head intact.