October 2026 K-Pop Group Debuts: A I W E O, KO1KEYZ, A2O SOUL, and A2O LITE

Four Rookie Groups Debuting in October 2026 and Their Member Compositions

In October 2026, the domestic K-pop market saw the emergence of four rookie groups that opted for different musical directions and debut methods. Starting with A I W E O on October 1st, followed by KO1KEYZ on the 7th, and A2O SOUL and A2O LITE on the 13th, these groups debuted sequentially. There are 40 members in total across these groups, varying significantly in structure from a four-member girl band to a 15-member global boy group. The characteristics of the October rookie lineup are particularly evident in the fact that a band participating in self-composition, a group from a global audition program, and groups launched based on a large-scale producing system all began their activities in the same month.

The first to debut, A I W E O, is a four-member girl band that released their first EP 'BE MY HUG' on October 1st. Presented by authentic, the agency of singer-songwriter Hanroro, the team consists of members Dream, Dayoung, Hyunsu, and Seoyu. Dream serves as the main vocalist, Dayoung handles sub-guitar and sub-vocals, Hyunsu is the main guitarist and sub-vocalist, and Seoyu is on bass. The debut album contains a total of 7 songs, including three title tracks: 'Scratches', 'A I W E O', and 'Shoelace'. All four members participated in writing the lyrics and composing all the tracks on the album, while Hanroro participated in writing the lyrics for 'Shoelace'. Prior to their debut, A I W E O introduced their music and team identity through a documentary and music videos.

The birth years of the A I W E O members range from 2004 to 2008. Dream was born on February 2, 2004, and her MBTI is INFP, while Dayoung was born on July 23 of the same year and is an ENFJ. Hyunsu was born on August 3, 2006, and is an ISTP, and Seoyu was born on May 19, 2008, and is an INFP. Among the four members, Dream and Seoyu share the same personality type as INFP, while the other two members are registered with different types. Following their debut, A I W E O scheduled their first solo concert, 'BE MY HUG', at Yes24 Wonderlock Hall in Seoul on November 8, bridging their music release with live performances.

On October 7, the 12-member boy group KO1KEYZ officially debuted simultaneously in South Korea and Japan. KO1KEYZ is a group formed through Mnet Plus's global audition program, 'PRODUCE 101 JAPAN 新世界'. It includes Korean members Park Siyoung and Oh Sinhaeng, along with 10 Japanese members. The final member selection reflected votes from viewers in approximately 180 countries, and the program expanded the existing Japan-centric audition structure into a global participation model. The group name KO1KEYZ embodies the meaning of becoming a key that opens the hearts of fans around the world.

The 12 members of KO1KEYZ are Ono Keito, Park Siyoung, Oh Sinhaeng, Yada Yoshiki, Kato Daiki, Iizuka Ryoga, Yanagiya Issa, Abe Yura, Sugiyama Ryuji, Hamada Towa, Terui Kosuke, and Goto Yuki. The oldest member, Ono Keito, was born on July 25, 2000, and the youngest, Goto Yuki, was born on December 24, 2007. Based on their registered MBTI, Park Siyoung and Yanagiya Issa are INFP, Yada Yoshiki and Sugiyama Ryuji are ENFP, and Abe Yura and Terui Kosuke are ISTP. The remaining members consist of different types such as ENTJ, ISFP, ENTP, INTP, ESFP, and INFJ. Their debut single features the 1990s-style dance track 'Koi Kids' as the title song, and includes both Korean and Japanese versions. 'Koi Game' and 'Key of Story' were also included in the debut album.

On October 13, A2O Entertainment simultaneously introduced the boy group A2O SOUL and the girl group A2O LITE. Both groups are part of a new domestic debut project pursued by producer Lee Soo-man after he left SM Entertainment. Producer Yoo Young-jin also participated in the production of the music and performances. The two teams held a joint global debut showcase, 'WELCOME TO SOULITE From A2O SOUL A2O LITE', on October 12 at KINTEX in Goyang, Gyeonggi-do, one day before the official release of their music. They subsequently released their respective music tracks at 6 PM on the 13th. The total number of members combined for both teams is 24, including members with backgrounds from various countries such as Korea, China, Japan, Thailand, and the United States.

A2O SOUL is a 15-member boy group consisting of Moon, Sora, Seoha, Teo, Gaku, Jun, Hansung, Lucien, Siwon, Allure, Tai, Sono, Jai, Aiden, and Jet. The birth years of the members range from 2007 to 2012; the oldest member, Moon, was born on April 7, 2007, and the youngest, Jet, was born on June 21, 2012. In the registered MBTI, Hansung, Siwon, and Jet are the most common at ENFP, while Moon and Aiden are INFP. Gaku is ISFP, Tai is INTJ, Sono is ENTP, and MBTI information for the remaining 7 members is not registered. A2O SOUL released the pre-debut single 'SUPERSTAR' on October 13 and announced the release of their first album 'SUPERSTAR' on November 9. It was announced that the album would contain a total of 5 songs, including 'SUPERSTAR' and 'Dancing in the Dark' as double title tracks. As their musical direction, they presented 'NEW SYNTHWAVE', a modern reinterpretation of synthwave.

Debuting on the same day, A2O LITE is a 9-member girl group consisting of Young, Himeki, Bora, Siri, Rada, Merci, Ayun, Oa, and Aijing. The oldest member, Young, was born on October 27, 2008, and the youngest, Aijing, was born on April 24, 2013. Among the members, Himeki's MBTI is registered as INFJ, Bora as INTJ, Merci as ISTJ, Oa as ENFP, and Aijing as ESFJ. The MBTI of Young, Siri, Rada, and Ayun is unregistered. The debut song of A2O LITE is 'NEON', which achieved success on domestic music charts after its release on October 13. The song reached number 1 on the Melon TOP100 at 11 PM on October 14, the day after its release. A2O Entertainment placed different member compositions and musical directions within one joint project while launching both groups simultaneously.

Comparing the debut compositions of the four groups, the totals are 4 for A I W E O, 12 for KO1KEYZ, 15 for A2O SOUL, and 9 for A2O LITE, making 40 members in total. A I W E O focuses on band instrument playing and the members' participation in creation, while KO1KEYZ is characterized by the selection process through an audition and simultaneous debut in Korea and Japan. A2O SOUL and A2O LITE launched male and female groups of different sizes simultaneously under the same production system. Furthermore, both A2O groups contain many members born after 2010, clearly showing the age composition of the rookie idols. These differences are confirmed not only by the number of members but also by the music production method, fandom formation process, and active countries and debut strategies. The four groups that debuted in October 2026 show different starting structures: band-type, audition-type, and global large-scale groups.