* Full Name: Jung Yong Hwa (정용화) (ジョン・ヨンファ, 鄭容和)
* Date of Birth: June 22, 1989 (1989-06-22) (age 21)
* Position: Leader, Main Vocalist, Rapper, Guitarist
* Full Name: Lee Jong Hyun (이종현) (イ・ジョンヒョン, 李宗泫)
* Date of Birth: May 15, 1990 (1990-05-15) (age 20)
* Position: Lead Vocalist, Guitarist
starring in acoustic 2010
* Full Name: Kang Min Hyuk (강민혁) (カン・ミンヒョク, 姜敏赫)
* Date of Birth: June 28, 1991 (1991-06-28) (age 19)
* Position: Backing Vocalist, Drummer
starring in acoustic 2010
* Full Name: Lee Jung Shin (이정신) (イ・ジョンシン, 李正信)
* Date of Birth: September 15, 1991 (1991-09-15) (age 19)
* Position: Backing Vocalist, Rapper, Bassist
* Kwon Kwang Jin (권광진) - Bassist, Backing Vocalist (2009)
2009: Debut, Now or Never, and Voice
In mid-June of 2009, CN Blue began to perform on the streets and in live clubs in Japan. As an indie band, they formally debuted on August 19, 2009 with Now or Never. The mini album was recorded completely in English, and failed to chart on the Japanese national music chart. Later, in November, the second extended play was released entitled Voice. Voice peaked at position 227, and stayed on the Oricon for two weeks, and was recorded mostly in English but also in Japanese.
2010: Korean debut, ThankU, and other activities
In January, FNC Music unveiled new teaser pictures for CN Blue's debut in South Korea. Bluetory was released on January 14, 2010. It stayed at the top of the Gaon Chart for two weeks. "I'm a Loner" (Korean: 외톨이야) was promoted as the title track. The song peaked at number two, solidifying their break into the industry. The group had their first televised live stage on KBS Music Bank on January 15. Later, on January 29, the group won their first music show chart win on Music Bank.
The group debuted their new reality show on Korean music channel Mnet, titled "CN Bluetory," on February 10. In March, the band started preparations for their first full length album ThankU. It was released on March 20, 2010, with only one new track. The album peaked at number 90 on the Oricon charts, their highest thus far. Later, in April, their official fanclub name was announced as BOICE, a combination of "blue" and "voice."
CN Blue headed back to Korea in May and released their next promotional single, "Love Light" (Korean: 사랑 빛), on May 10, 2010. The song peaked at number 10 on the Korean national chart and foreshadowed their upcoming release. On May 19, the second extended play was released, named Bluelove. It was promoted with the track "Love," which charted at number 2, matching the success the band found earlier with "I'm a Loner." Bluelove peaked at number 3, but staying on the chart for many weeks. CN Blue held their comeback stage on M!Countdown the following day.
After success in Korea, the band headed back to Japan. They released their first single "The Way" on June 23. For the first time, they charted within the Oricon top 40 at number 26. The release was followed by "I Don't Know Why" on September 16 the same year. The song reached number eight on the Oricon daily chart, marking the first time the band made it inside the top 10. On the weekly chart, they peaked at number 15. On the Japanese indie top chart, the band reached number one. The band embarked on a small tour across Japan in order to promote the single.
CN Blue members Kang Min Hyuk and Lee Jong Hyun will star in the Korean movie "Acoustic." They released a song from the OST on October 7 entitled "High Fly" that peaked at number 98 on the Gaon Chart.