Kusabi (楔-kusabi-, "Wedge") is the first mini album and seventh original album by Japanese boy band KAT-TUN, released in Japan on November 27, 2013, under the label J-One Records.

The title track "Kusabi" was used as the theme song for the drama Henshin Interviewer no Yūutsu starring KAT-TUN member Yuichi Nakamaru and actress Fumino Kimura, while "Gimme Luv" was used in a Suzuki Solio Bandit television commercial.

All versions of the album include "Kusabi", "Gimme Luv", "On & On", and "Fire and Ice".

[4] The Limited Edition 1 has a total of six tracks, with "Boku Nari no Koi" and "Monster Night", a solo by KAT-TUN member Tatsuya Ueda, and a DVD containing the music video and making for "Kusabi", and the music video for "Monster Night".

[10] In conjunction with the release of Kusabi, the group is also set to perform their first concert in almost two years, at Kyocera Dome on 30 and 31 December.