The Atari Japan purchase was not an immediate success, in part due to the medal game fad of the 1970s.[1] While Nakamura Manufacturing saw some success with imports such as Kee Games's Tank, the Japanese video game industry's decrease in popularity did not make them as profitable as hoped.[7] The market become more viable once restrictions on medal games were imposed by the Japanese government in 1976,[7] as Nakamura Manufacturing began returning higher profits; its import of Atari's Breakout was so successful that it lead to rampant piracy in the industry.[6] By the end of the year, Nakamura Manufacturing was one of Japan's leading video game companies.[6]