Big Bang (another name: 1st Japanese Album) is the second studio Japanese album by South Korean boy band, Big Bang and was released on August 19, 2009.

Production of the album started from the release of the group's first Japanese single, My Heaven on June 2009. The song enjoyed mild success, afterwards, the group's second single was released, ガラガラ GO!! (Gara Gara Go!!), and approximately a month later, the single sold over 30,000 copies. Big Bang then finished recording the album by the end of July. The song Love Club, though, is the only track in pure English language.

"Big Bang" debuted on the daily Oricon charts at number 2 with over 12,000 copies being sold on the first day. The album went on to chart at number 3 on the weekly Oricon charts.

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