U.S. media giant and cable operator Comcast Corp. confirmed Monday it will buy a 51 percent stake in USJ Co., operator of the Universal Studios Japan theme park in Osaka, for about $1.5 billion (¥180.42 billion).

It is Comcast's biggest overseas investment, as the largest U.S. cable operator seeks international growth after being stymied in its bid to acquire its second-largest competitor Time Warner Cable Inc.

Under an agreement reached with USJ shareholder Goldman Sachs Group Inc., Comcast will purchase the shares via its unit NBCUniversal, which operates Universal Studios theme parks in Hollywood and Orlando, Florida.