
In 2003-2004, their popularity rose to that of a debuted group, to the point where they performed on Music Station multiple times before debuting. Since then, KAT-TUN has held concerts in Japan almost every season. This is the current record in Japan for the most performances in one day. That same year, they performed eleven shows in a single day. 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. 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. 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. 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. History 2001–2005: Formation and pre-debut activities īefore becoming KAT-TUN, each member belonged to different trainee units within Johnny & Associates. 1.11 2021 - 2022: Resume of Group Activities and Honey.1.10 2016 - 2019: Hiatus, Recharging Period, CAST and Ignite.


1.9 2015: Taguchi Junnosuke's departure.1.8 2013 - 2014: Tanaka Koki's departure and Come Here.1.5 2009 - 2010: Break the Records: By You & For You, Akanishi Jin's departure and No More Pain.1.1 2001–2005: Formation and pre-debut activities.By the end of March 2016, Taguchi left both the group and the agency, leaving KAT-TUN with only three remaining 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. 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. Since then, all of their single, album and music DVD releases have debuted at number one on the Oricon music and DVD charts. Their debut on Mawas marked by a tripartite release of a CD single, album and music DVD on their exclusive record label J-One Records.

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. KAT-TUN ( カトゥーン, Katūn) is a Japanese boy band formed under Johnny & Associates (Johnny's) in 2001.
