According to the embodiment, an episode acquisition unit that acquires an episode text-input by a registered user, an episode management unit that manages the acquired episode, and a registration tag that is meta information of the episode based on the acquired episode Registration tag extraction unit for extracting the registered tag, a registration tag management unit for managing the extracted registration tag as tag information associated with the managed episode, and a condition acquisition unit for acquiring the condition input by the search user as condition information A search tag extraction unit that extracts a search tag from the condition information, a registration tag presenting unit that presents a search tag with a high similarity to the search tag to be selectable to the search user, and a registration tag selected by the search user An episode presenting section for presenting episodes having a high similarity to the search user.
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