TV-Series
Description
Kawauso is a river otter yōkai from Japanese folklore, haunting Obebe Swamp, which grants him the alternative name Obebe. His appearance varies: typically an anthropomorphic otter, sometimes in simple clothing like a t-shirt and shorts, or in the 2007 anime, wearing a light pale yellow kimono with a pale blue diamond pattern, a conical pale green hat with frayed edges, and barefoot. He possesses light brown fur, whiskers beside his mouth, and a prominent tail.

His role and background shift significantly across anime adaptations. In the 1968 and 1971 series, he tricks passersby like Nezumi-Otoko into collecting clams and turtles from Obebe Swamp for him to sell, with Kitarō thwarting his schemes. The 1985 anime retains this plot while adding his resentment towards a nearby village for damming the swamp. The 1996 anime changes his narrative: after robbing Nurarihyon, an elderly man mistakes him for his grandson Kotarō, leading Kawauso to abandon crime and form a genuine bond.

The 2007 anime establishes him as a recurring resident of Yōkai Yokochō, renting a room at Sunakake-Babaa's boarding house. He speaks with a lisp and exhibits a carefree, mischievous personality, often teaming with Amabie for comic relief. While occasionally joining Nezumi-Otoko's schemes, he remains loyal to Kitarō, fleeing to warn him when Nezumi-Otoko collaborates with enemies. This version frequently assists in underwater missions or against fire-based yōkai and becomes one of the 47 Yōkai Warriors of Japan, representing Ishikawa Prefecture. An episode retells the Obebe Swamp story loosely based on earlier versions.

In the 2018 series, he appears in opening sequences and serves as the ferryman for the Clam Boat, aiding Kitarō's group in navigating islands to locate the Yōka source. His first full episode, "Kawauso's Lie," revisits his trickster nature within broader plotlines.

His abilities include expert swimming, water manipulation (like firing mouth water cannons), and limited human transformation, though the latter is rarely used and falters when distracted. Temporarily, via Kitarō's "Yōkai Cloth" form during the battle against Qi, he gains enhanced powers: hair manipulation, whisker needles, finger guns, internal electricity generation, and amplified water control. These powers revert after Qi's defeat.

Folklore depicts Kawauso as river otters achieving yōkai status through exceptional longevity. They are shape-shifters, often taking human form like kitsune or tanuki, but frequently portrayed as dangerous. Legends describe female Kawauso maiming or killing humans, employing illusions to deceive victims, requiring adversaries to use strategic countermeasures.

Kawauso evolves from a minor antagonist in early adaptations to a comic yet loyal ally in later series, maintaining trickster roots while increasingly contributing to Kitarō's missions. His design, personality, and narrative significance are consistently reimagined across media, reflecting the franchise's dynamic approach to yōkai lore.