Big Bang (also known as 1st Japanese Album) is the second Japanese studio album by South Korean boy band BigBang, and was released on August 19, 2009.
Production of the album started from the release of the group's first Japanese single, "My Heaven", in June 2009. The song enjoyed mild success; afterwards, the group's second single was released, "Gara Gara Go!!" and approximately a month later, the single had sold over 30,000 copies. BigBang finished recording the album by the end of July. The song "Love Club" is the only track sung entirely in English.
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.