Atama no Taisou (頭の体操, lit. 'Head Gymnastics') is a series of puzzle collections that were released by Kobunsha, and written by Akira Tago. As of 2010^[update], there were 23 regular volumes with an e-book volume released.

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The first volume was published in 1966 and sold more than 2.5 million.^[1] The series has sold 12 million copies^[2] and become a best-seller in that year.

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