User:Heolkpop/sandbox

2019: Japanese debut, subsequent releases and temporary hiatus
Iz*One held their Japanese debut show-con in Tokyo Dome City Hall on January 20, where they performed their debut Japanese single "Suki to Iwasetai" for the first time. The music video for the single was released on January 25, five days after the event, while the single itself was released on February 6. It peaked at number 2 on both the Oricon Singles Chart and the Billboard Japan Hot 100, selling over 200,000 copies on its first week. On March 8, it was certified Platinum by the Recording Industry Association of Japan (RIAJ) with over 250,000 unit sales, the group's first Platinum certification.

On March 9, English DJ and producer Jonas Blue released a new version of his 2018 hit single "Rise", featuring Iz*One on vocals.

The group released their second EP titled Heart*Iz on April 1. Domestic pre-orders for the EP exceeded 200,000 copies. Upon its release, it topped in both the Gaon Album and Oricon Overseas Album Charts, and sold more than 130,000 copies in the first week of its sale, a new record for a K-pop girl group at the time. The EP was then certified Platinum on October 10 by the Korea Music Content Association (KMCA) after selling more than 250,000 shipment figures. It peaked at number 6 on Billboard World Albums chart. Meanwhile, the lead single "Violeta" from the EP peaked at numbers 18 and 5 on Gaon Digital Chart and Billboard K-pop Hot 100 respectively. It also charted at number 8 on Billboard World Digital Songs. The song received its first music program win on SBS MTV's The Show on April 9.

Iz*One began their first headlining tour titled Eyes On Me at the Jamsil Indoor Stadium in Seoul, South Korea. After tickets for the first two initial dates–June 8 and 9–were sold out, Off the Record added an additional concert date on June 7. During the tour, they performed two new songs, "Ayayaya" and "So Curious", as sub-units. Overall, the group visited eight cities in five territories, with 81,000 attendance in total. On July 6, the group participated in the annual music festival KCON, held at the Madison Square Garden in New York City, their first U.S. performance.

The group released their second Japanese single, "Buenos Aires", on June 26. The single debuted atop on both Japanese domestic charts–the Oricon Singles Chart and the Billboard Japan Hot 100. It received its Platinum certification by the RIAJ in July 2019. On September 25, Iz*One released their third Japanese single titled "Vampire". Like the previous release, the single topped on both domestic charts in Japan with its first week sales exceeding 200,000 copies; leading to its Gold certification by the RIAJ. It is also the group's only Japanese release to chart on Billboard K-pop Hot 100, peaking at number 52. Following their commercial success, the group became Oricon's best-selling new artist for the first half of 2019, accounting an estimated earning of ¥510 million (₩5.5 billion) of total sales in Japan between December 10, 2018 and June 9, 2019. Iz*One participated in the 2019 Tokyo Girls Collection events held in three consecutive cities, the first guest performer to do so.

The group was scheduled to release their first studio album on November 11. However, the release was postponed due to the Mnet vote manipulation investigation. Investigations revealed that the Produce 48 producer Ahn Joon-young had selected all twelve members of Iz*One before the finale. As a result, Iz*One's showcases, promotions, and several guest appearances were cancelled or put on hold,    which included the release of their concert film, Eyes on Me: The Movie, and their Japanese promotions.

2020: Resumption of activities and commercial success
Following a three-month hiatus, the members' agencies and CJ ENM reached an agreement to resume the group's activities on January 6. The group subsequently released their first studio album Bloom*Iz on February 17. It sold more than 356,000 copies on the first week of its release, setting a new record for the highest first-week album sales for a K-pop girl group. The album peaked at number 2 on the Gaon Album Chart and received a Platinum certification by the KMCA after exceeding 250,000 unit sales.

The album became the second best-selling Korean-language album of 2020, trailing behind BTS' studio album Map of the Soul: 7, at the time. As of April 2020, it sold more than 480,000 copies (including 25,000 copies of Kit version). The album peaked second on Japan's Oricon Albums Chart, while peaked at number 15 on Billboard World Albums and sold 1,000 equivalent album units in the U.S. as of February 20.

Impact
Iz One accounted an estimated earning of ¥510 million (₩5.5 billion)

Name
"IZ" is a numeronym for the number 12, a homage to their twelve members and the twelve astrological signs of the zodiac – the latter which symbolized by the asterisk (*). "ONE" indicates that they are one as a group.