Oni Pro (Productions) was a loose-knit group of creative media professionals which included actors, artists, writers, etc. It was founded by writer Oniroku Dan in 1969 and its initial headquarters consisted of a rented apartment in Shibuya, Tokyo. Oni Pro was involved in film production, magazine publishing and live theater performance. The main theme of its creations was SM/bondage. Perhaps its most well-known member, besides Dan himself, was Hachiro Tako, former flyweight boxing champion of Japan who, after his retirement from the ring, became an actor and comedian.