SM Entertainment project for Super Junior

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Since debut, SM Entertainment has created four subgroups for Super Junior. Every member was put into different subgroups excluding Kibum, due to his busy acting schedule. The intentions of the subgroups were part of SM's strategy to not limit Super Junior's activities, and the goal was to show that the group could accommodate different musical genres. However, this strategy was later challenged by critics, as it has influenced an overwhelming amount of music groups to create official and unofficial subgroups alike. SM announced that Super Junior will form more subgroups in the future, and possible focuses of these subgroups include a variety of genres such as rock and hip hop. Previous Super Junior subgroups will also return to the industry along with appearances of new subgroups

1. Super Junior-K.R.Y

Super Junior-K.R.Y, established in November 2006, is a trio formed by Kyuhyun, Ryeowook, and Yesung which makes up K.R.Y.in the title of the group. The company discovered that these three members developed a particular personal and subsequent fan-base that was separate from the rest of the group, and how they also had similar musical qualities. They therefore grouped these three members together to perform particular songs to target a more mature audience. Being amongst the most vocally powerful members of the group, Super Junior-K.R.Y are credited to singing mournful, R&B-style ballads, a style that has proven very popular in recent years.

Super Junior-K.R.Y's first official performance was on November 5, 2006 on KBS's Music Bank, performing "The One I Love (한 사람만을)." They have participated in the original soundtrack of the tvN drama Hyena with a total of three tracks, including the main theme. The trio also contributed tracks in two additional original soundtracks, one track in both the soundtracks of Snow Flower and Billy Jean Look at Me. Unlike Super Junior's other sub-units, Super Junior-K.R.Y has not officially released a single or album, and only participated in collaboration albums and original soundtracks. However, a new album is expected from K.R.Y in the future.

On August 1, 2010, Super Junior’s sub-unit K.R.Y. made history by opening their own concert for the first time in Japan, and upon the fans’ request for an encore, more performances were added in Kobe on the 1st and 2 November and later on, 1 and 2 December in Fukuoka. There were about a total of 22,000 people who had watched the 6 sessions of the performances. The group has successfully finished their concert in Japan and Taiwan last year. Due to ardent requests from Korean fans wanting to see Super Junior-K.R.Y.’s concert, the group decided to hold the concert in Korea .

2. Super Junior Trot

SUPER JUNIOR T
Super Junior-Trot (Korean: 슈퍼주니어-트로트), officially known as Super Junior-T (Korean: 슈퍼주니어-티) is the second official sub-unit of Korean boy band Super Junior. They are one of the few new generation singers known to have been capitalizing trot music, the oldest form of Korean pop music. Super Junior-T contains six Super Junior members, Leeteuk (the leader), Heechul, Kang-in, Shindong, Sungmin, and Eunhyuk.
Super Junior-T has released only one single in the short span of their career before they were announced to be on hiatus in 2008. The single "Rokugo" was Korea's sixteenth best-selling record and the number one best-selling single of 2007, according to the Music Industry Association of Korea.^[1] In November 2008, the subgroup returned with a debut in the Japanese music industry, releasing the Japanese version of “Rokugo.”

3. Super Junior M

Super Junior-M was formed to target the Mandopop market and debuted in 2008 with seven members: Han Geng, as the leader, Siwon, Donghae, Ryeowook, Kyuhyun from Super Junior, plus two Chinese members drafted in only for this sub-group Henry (a Chinese Canadian), and Zhou Mi. In December 2009, Han Geng returned to China to pursue a solo career. In February 2011, Super Junior members Sungmin and Eunhyuk were added to the subgroup and resumed their activites with the release of EP Perfection. The eight active members are: Siwon, Donghae, Ryeowook, Eunhyuk, Kyuhyun, Sungmin, Zhou Mi, Henry

4. Super Junior-Happy

Super Junior-Happy (Korean: 슈퍼주니어-해피), sometimes referred to as SJ-Happy or Suju-Happy (Korean: 슈주-해피), is the fourth official sub-unit of Korean boy band Super Junior. Super Junior-Happy contains six Super Junior members, Leeteuk (the leader), Yesung, Kang-in, Shindong, Sungmin, and Eunhyuk

THE HISTORY( SUPER JUNIOR )

Since 1990^th, Korean talent agent and SM Entertainment had held the audition of the year to find the new talent to complete the success of Pop Group, H.O.T, S.E.S and Shinwa, which, alL of it were created by Soo-Man-Lee from SM . Entertainment in the middle of 1990^th. Leeteuk and Eunhyuk is two of the first member who had directed in 2000^th under of SM's Starlight Casting System in Seoul.

In 2001, the company held their first overseas casting auditions and discovered Han Geng in Beijing, China, who was chosen among three thousand applicants. That same year, Yesung was discovered under Seoul's casting system. Sungmin and Donghae became trainees after jointly winning the first place in Best Outward Appearance in an SM-sponsored contest. In 2002, Heechul and Kangin were recruited along with Kibum, who was discovered in Los Angeles. Siwon was recruited in 2003 and Ryeowook in 2004, in which the latter was discovered through the Chin Chin Youth Festival singing competition. In 2005, Shindong was selected. The last member, Cho Kyuhyun,was then discovered after he won third place at the Chin Chin Singing Competition in 20  05.

Not long after boy band TVXQ's debut in 2003, news about Lee's unprecedented plans of forming another boy band quickly spread on the Internet. In early 2005, Lee confirmed the news and announced that an all-boy project group of twelve members would debut near the end of the year, promoting this singing group to be "The Gateway to Stardom of Asia." Lee announced that that most members in this group were chosen because of their performing experiences as actors,models, and radio hosts prior debut. Heechul and Kibum were already established entertainers, and most of the other members had already made various kinds of appearances on television and media. Highly inspired by the rotational concept of Japan's girl group Morning Musume, this group would also experience line-up changes, with new members replacing some selected members every year to keep the group constantly young and all-rounded. This concept was then newly introduced to the K-pop market.

For a while the group was rumored to be called O.V.E.R, the acronym for "Obey the Voice for Each Rhythm." However, before the group settled with their current name, SM simply referred to them as Junior, a representation of the members' young ages when they first became SM trainees. After the members' showcased their different talents to the company at a picnic, the company finalized their concept name to Super Junior. The group thereafter became officially Super Junior 05, the first generation of Super Junior.

 Super Junior 05 made their pre-debut on the Korean channel Mnet on September 11, 2005. At the showcase, they performed various styles of hip hop dancing. The group danced to B2K's "Take It To The Floor." Han Geng, Eunhyuk, and Donghae also performed a separate dance away from the group, dancing to Usher's "Caught Up." However, the performance did not air on television until May 16, 2006 as a segment in the Super Junior Show, the group's first television documentary.