Tanaka Koki

Quick Facts: Who was Tanaka Koki?

Subject:

Tanaka Koki

Known for:

Member of the Japanese boy band KAT-TUN, known for his participation in major J-Pop milestones.

Verified Source:

2Day Chrono-Wiki & Primary Historical Archives

Origins & Early Life

KAT-TUN (カトゥーン, Katūn) was a Japanese boy band under Starto Entertainment. Their formation under Johnny & Associates was in 2001. The group's name was originally an acronym based on the first letter of each member's family name: Kazuya Kamenashi, Jin Akanishi, Junnosuke Taguchi, Koki Tanaka, Tatsuya Ueda, and Yuichi Nakamaru. Their debut on March 22, 2006, was marked by a tripartite release of a CD single, album and music DVD on their exclusive record label J-One Records. Since then, all of their single, album and music DVD releases have debuted at number one on the Oricon music and DVD charts.

Career & Major Achievements

In 2010, Akanishi left the group to start a solo career, making the group's acronym then come from Kamenashi, Taguchi, Tanaka, Ueda, and Nakamaru, and the group toured with five members. In 2013, Tanaka's contract was terminated for several violations, leaving KAT-TUN as a four-man ensemble, and Tatsuya Ueda took the T to keep the acronym. By the end of March 2016, Taguchi left both the group and the agency, leaving KAT-TUN with only three remaining members. On February 12, 2025, the members announced they would disband on March 31. Before becoming KAT-TUN, each member belonged to different trainee units within Johnny & Associates.

Enduring Legacy & Impact

In 2001, eight members were chosen to become a temporary dancing unit in order to support Koichi Domoto in the NHK music program, Pop Jam. The eight members were switched around before it officially became KAT-TUN, with the current three members plus Jin Akanishi, Koki Tanaka and Junnosuke Taguchi. Although the formation was only meant to be a temporary support unit, KAT-TUN gained a great deal of attention and became a solid unit. In 2002, in response to many requests, KAT-TUN held their first concert called Okyaku-sama wa Kami-summer - Concert 55man Nin Ai no Request ni Kotaete!! (お客様は神サマーConcert 55万人愛のリクエストに応えて!!), for which 550,000 people tried to get tickets.

Chronological Milestones & Life Events

1. 2001: 2001 Milestone — Their formation under Johnny & Associates was in 2001.
2. 2002: 2002 Milestone — In 2002, in response to many requests, KAT-TUN held their first concert called Okyaku-sama wa Kami-summer - Concert 55man Nin Ai no Request ni Kotaete!!
3. 2006: 2006 Milestone — Their debut on March 22, 2006, was marked by a tripartite release of a CD single, album and music DVD on their exclusive record label J-One Records.
4. 2010: 2010 Milestone — In 2010, Akanishi left the group to start a solo career, making the group's acronym then come from Kamenashi, Taguchi, Tanaka, Ueda, and Nakamaru, and the group toured with five members.
5. 2013: 2013 Milestone — In 2013, Tanaka's contract was terminated for several violations, leaving KAT-TUN as a four-man ensemble, and Tatsuya Ueda took the T to keep the acronym.
6. 2016: 2016 Milestone — By the end of March 2016, Taguchi left both the group and the agency, leaving KAT-TUN with only three remaining members.
7. 2025: 2025 Milestone — On February 12, 2025, the members announced they would disband on March 31.

Historical Fact-Check Quiz: Tanaka Koki

True or False: “Did KAT-TUN become the first group to hold their own performances at Tokyo Dome before officially debuting?”

Answer (TRUE ⭕): Yes, in March 2006, they performed at the Tokyo Dome for 110,000 people over two days, preceding their official debut.

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Frequently Asked Questions about Tanaka Koki