|Stage Name||Birth Name||Position||Birthday||Age||Height||Star Sign||C Y Sort descending||BT|
|Hwanhee 환희||Lee Hwanhee||Vocal||19||175 cm or 5'9"||Taurus||Tiger||O|
|Xiao 샤오||Lee Dongyeol||Maknae||19||177 cm or 5'9½"||Sagittarius||Tiger||B|
|Kogyeol 고결||Go Minsoo||Vocal||21||183 cm or 6'||Taurus||Rat||A|
|Wei 웨이||Lee Sungjun||Rapper||21||185 cm or 6'1"||Gemini||Rat||O|
|Bitto 비토||Lee Changhyun||Dancer, Rapper||21||180 cm or 5'11"||Virgo||Rat||O|
|Wooshin 우신||Kim Wooseok||Visual||21||175 cm or 5'9"||Scorpio||Rat||B|
|Sunyoul 선율||Seon Yein||Vocal||21||175 cm or 5'9"||Scorpio||Rat||B|
|Gyujin 규진||Han Gyujin||Sub-vocal||20||181 cm or 5'11½"||Scorpio||Ox||AB|
|Jinhoo 진후||Kim Jinwook||Leader, Vocal||22||173 cm or 5'8"||Leo||Pig||A|
|Kuhn 쿤||No Sooil||Rapper||22||183 cm or 6'||Scorpio||Pig||O|
UP10TION 업텐션, pronounced "up-tension," is a male idol group formed by TOP Media in 2015. The group consists of ten members: Jinhoo, Kuhn, Kogyeol, Wei, Bitto, Wooshin, Sunyoul, Gyujin, Hwanhee, and Xiao. The group debuted with a mini-album, Top Secret. Their official fan club name is Honey10.
On July 2015, the members of UP10TION made their debut and were introduced one by one through their show "Masked Rookie King," also known as "King of Masked Rookie UP10TION," a parody of MBC's "King of Mask Singer." The members competed and showed their abilities and charms while wearing a mask in front of a panel of judges. Those who were selected by the judges were be able to take off their mask. The panel of judges was Shinhwa's Andy, Teen Top's Chunji, and 100%'s Rokhyun and Chanyong. The first member was introduced was Wooshin. The second and third members were Jinhoo and Hwanhee. The fourth member was Bit-to with a deep soulful voice, and the fifth was Kogyeol with a powerful and emotional vocal. The sixth and seventh members were Kuhn and Sunyoul, who both have a charming visual and voice. The ten-member group was finally introduced with its last members Wei, Gyujin, and Xiao.
On September 9, UP10TION held a debut showcase at AX Concert Hall in Seoul. UP10TION's debut mini-album Top Secret, including the debut single "So Dangerous," was released on September 11, 2015. The album debuted at number 9 and peaked at number 7 on the Gaon Album Chart. They made their official music program debut on September 10 through Mnet's "M Countdown," performing their debut single "So Dangerous." They had their debut album showcase in Beijing, China on September 22. The "So Dangerous" music video was ranked 9th place in Billboard's Most Viewed K-pop Videos in America for the month of September 2015.
On November 26, UP10TION released their second mini-album Bravo! with the lead single "Catch Me!" which was produced by Iggy and Yong Bae, who produced Ailee′s "Heaven" and GFriend′s "Me Gustas Tu." It also included the track "Party2nite," written and composed by Teen Top's Changjo. The album peaked at number 5 on the Gaon Album Chart.
After a three-month hiatus, UP10TION released their third mini-album Spotlight with the track "Attention" on April 18. On May 2016, TOP Media confirmed that UP10TION would hold their Japanese debut showcase in Tokyo on June 4, followed by a showcase at the Osaka River Forum on June 5.
On August 5, UP10TION returned with a fourth mini-album to highlight the summer, called Summer Go! The official music video for "Tonight" was released on the same day, expressing a "chilled out and party like" atmosphere.