Diomedéa is a Japanese animation studio based in Nerima, Tokyo; it was also formerly known as

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Studio Barcelona. The company's notable works include: Squid Girl, Noucome, Problem Children Are Coming from Another World, Aren't They?, Riddle Story of Devil, and Nogizaka Haruka no Himitsu. They have animated and produced the anime television series Gonzo Gang Mater.

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