Movie
Description
Unagi-Inu, meaning "Eel-Dog", is a fictional hybrid creature appearing in works related to Fujio Akatsuka's "The Genius Bakabon" franchise. His creation sparked during a sweltering idea meeting at Fujio Pro after an air conditioner failure. Two origin stories exist: one credits editor Takao Igarashi suggesting a heatstroke-afflicted police officer hallucinating a dog as an eel, prompting Akatsuka to sketch the hybrid; the other claims Akatsuka spontaneously saw a dog resembling an eel outside a window, leading directly to the design.

Physically, Unagi-Inu possesses a long, slender eel-like body and tail combined with a dog-like head and legs. His typical coloration is black with a white underbelly, large pink lips, and white or blue tail fins. Due to potential misinterpretations of his black coloration and large lips resembling blackface caricatures, merchandise occasionally presents alternative colors. Animated adaptations, like the 1975 series, also portrayed him in bright blue, both to conserve black ink and ensure visual clarity.

His personality displays politeness and a laid-back demeanor. He frequently uses honorifics in speech and appends barks like "Wan wan!" to his sentences. A core aspect involves evading consumption, as his eel heritage makes him delicious to characters craving eel meat, particularly "The Police Officer with the Connected Eyes". Outside specific plots, he often serves as an observer or commentator on surrounding events, sometimes adopting a "tsukkomi" or straight-man comedic role, especially in the "Late Night!" anime.

Family relationships form a significant background element. His mother was an ordinary eel residing in a specially designed wet area of their home; deceased for 17 years by the "Late Night!" anime, with revelations of infidelity towards his dog father. His father was an ordinary dog who reportedly had an affair with a "Dog of Night". Apocryphal family tree articles mention siblings: an older sister, Unagi-Inue, who worked as a POLA Cosmetics saleswoman and married frog Korgenkowa, and a younger sister, Unagi-Inuko, a nurse. A pure white variant, White Unagi-Inu, appeared in the "Rerere" anime and pachinko games. The "Late Night!" anime introduced a daughter desiring to marry a human man, though her mother's identity remains unconfirmed. A gag in the "Let's La Gon" manga briefly showed a son named Inu-Unagi, featuring an inverted appearance (dog body with eel head).

His history reveals significant development. Initially conceived as a silent, one-shot character, he was grilled and eaten by Bakabon's family in his debut. However, his unique design sparked unexpected popularity, prompting Akatsuka to resurrect him for recurring roles. Subsequent portrayals shifted, depicting him aware of the risk of being eaten and actively employing strategies to avoid this fate. He evolved into a character dispensing advice or fleeing dangerous situations within the community.

His appearances extend beyond the core "Genius Bakabon" manga and anime into numerous other Akatsuka works, including "Osomatsu-kun", "Wanpei and Mo-chan", "Let's La Gon", "Bugs", "Gang Girl Keroko", "Bakumatsu Rare Dog Group", "Unkor Wat", "The Great Stupid Detective Kogoro Hakuchi", "Kensaku the Architect", "Song and Gag Theatre", "Gag Land", "Graphic Novel Poems", "The End of Unagi-Inu", "Wonderful Fool", "Run Away Run Away", several "Nyarome's Fun..." educational series, "What Will Fujio Akatsuka Do!?", "Comedy is Coming Now", "Basho Matsuo", "Sheeh! Comeback", "Japan Laughter Story", "Yarasete-ojisan", "Greatest in Japan, Putaro's Family", "Songo-kun (BomBom remake)", "The Cat House Owner", "Collapse of the Sheeh! Religion", and "Fujio Akatsuka's Animal Land".

Within animation, he debuted in the second "Original Genius Bakabon" series (1975), missing the 1971 adaptation created before his manga inception. His initial animated story softened his original fate, showing him surviving a cooking attempt with only his head intact on a skeletal body. He made minor appearances: a single impact frame in "Osomatsu-kun" (1988), initial focus in episodes 8A and 8B of "Heisei Genius Bakabon" (1990) before receding into backgrounds, background roles and a spotlight episode (Episode 4A) in "Rerere's Genius Bakabon" (1999-2000) where he also delivered pre-episode safety warnings. This series gave him a white female eel-dog love interest. The "Late Night! Genius Bakabon" (2018) explored his family background further, including his daughter. A CGI version appeared without dialogue in a Nippon Television Bakabon special.