What makes Breakthrough by Twice notable?

The album debuted at number one on the Oricon Albums Chart in Japan, showcasing Twice's immense popularity in the country. 'Breakthrough' also contributed to the group's ongoing success in breaking into the global market, further enhancing their influence within the K-pop genre. Released on June 12, 2019, 'Breakthrough' marked Twice's first Japanese studio album following their successful Korean releases. At this point in their career, Twice had already established themselves as a leading girl group in Asia, having released multiple chart-topping hits and solidified their international appeal.