In the anime's story, Hiroto longs to build a secret base near his house, and in his house's storeroom he meets a ninja and "Nintuber" named Tonkachi. Tonkachi, who knows about the existence of the "Ninja Box," forces Tonkachi to go to the "Village of Tatemakuri," where they meet a talking dog named...
Source: MyAnimeList
Other anime produced by Tatsunoko Production.
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