Kenta has the appearance of a stuffed bear. He is brusque, frequently rude, and sometimes picks up odd obsessions. He has a love-hate dynamic with Iyo, with whom he is always arguing or fighting but he still appears to be close to her. His attempts to assert his species identity frequently end in disaster. He is always seen wearing a red muffler, and it is usually a sign that something is very wrong if he is without it. He also often gives the punchline in jokes where all three of the trio are involved. His date of birth is the 6th of May.

On the first day her family moved to their new house, 5 year old Ami-chan made friends with three talking animals who came out of a door in her bedroom floor, which she finds out leads to Animal Yokocho, another world. The three are Issa, an overly innocent, soft-spoken panda, Kenta, a highly strung, red-scarf-loving bear who puts on an almost constant tough-guy act, and Iyo, a rabbit who usually holds her own well-being and enjoyment over the happiness (and safety) of her friends. Even at only 5 years old, Ami-chan is easily the most rational of the group, and she's a little wary at first, but she eventually comes around and starts spending her free time with them. A typical day involves Ami-chan and the three doing different things to pass the time, often playing a seemingly innocent game, but in AniYoko style. Unfortunately for Ami-chan, the AniYoko version usually turns out to be drastically different, much less logical, and usually more dangerous than the ordinary version. 
5 year old kindergarten girl, Ami-chan, has a secret which cannot be revealed to anyone: that is, she spends her days with mysterious animals who come to her house. These animals include a rabbit by the name of Iyo, a bear named Kenta and a panda called Issa. They are actually from Anima Yokocho, the place that the secret door in Ami-chan's room leads to. And of course, other mysterious characters from Animal Yokocho will subsequently make their appearances as well...
 
(Source: Anime News Network)

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She was once married to [Ryotaro Okiayu](https://anilist.co/staff/95177), with whom she had a daughter. They are now divorced.  She is often confused with Nao Nagasawa (the pop star) due to the fact that their names are the same when written in romaji.

Ami moves into a new house and finds a mysterious trapdoor in her room. From that trapdoor, pops out 3 strange animals. Iyo (rabbit), Issa (panda), and Kenta (bear) are from Animal Yokocho, which is where the trapdoor leads. Don&rsquo;t underestimate these cute little animals, because they can cause a whole lot of trouble. (Source: Shueisha, translated)