Otomania, also known as Zenjitsuyoyaku-P (前日予約P), is the author of the world-famous "Ievan Polkka" cover using Hatsune Miku. He had been active in the music trend before Niconico was established. He also provides songs for other creators and Project DIVA. He usually creates music only, and most of his videos on Niconico are posted by an agency.
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Niconico
