Clievy is from Oyama, Tochigi Keen from Kanoya, Kagoshima, and made their debut in 2007 on Kusuo's track KEEP MY WAY from the album Koi ga Ore Desubai. They were featured in a Kusuo song again on his hit single 1/6000000000. They started releasing their own music in 2008, their debut release being CK island, with three songs being released as digital singles leading up to the release. They released two more indie albums in the following two years, CKTV in 2009 and CK STYLE in 2010.
In 2010 they were signed to Universal Music Japan and released their debut single Tsuyuake Sengen in August of that year. Their second single Jokyo Gamushara Monogatari was released in two editions, a CLIEVY edition and a KEEN edition, each being a solo version of the song by that member. On the same day as this single was released the album It's CK which was a collection of some of their songs from their three indies albums. In September 2011 they released their debut major studio album, CK A-YANKA!!!.
They have since released three more studio albums and released two compilation albums in April 2016, CK IT'S A JAM ~BEST HIT UTA~ and It's CK ~Indies Complete~, the latter of which was not released by Universal but was an indies release.
- [2008.07.17] CK island (indies)
- [2009.02.25] CKTV (indies)
- [2010.02.17] CK STYLE (indies)
- [2011.09.21] CK A-YANKA!!!
- [2013.02.06] CK JUNGLE!!!
- [2013.11.27] CK AND MORE...
- [2015.10.14] CK MUSIC
- [2017.07.26] 55
- [2019.03.20] TEN
- [2010.11.24] It's CK
- [2016.03.09] It's CK ~Indies Complete~ (indies)
- [2016.04.13] CK IT'S A JAM ~BEST HIT UTA~
- [2017.05.24] Ai no Utatachi (アイのうたたち; Love Songs) (Digital)
- [2010.08.04] Tsuyuake Sengen (梅雨明け宣言)
- [2010.11.24] Joukyou Gamushara Monogatari (上京がむしゃら物語)
- [2011.03.16] Boku no Tonari ni Ite Kuremasen ka? (ぼくのとなりにいてくれませんか?)
- [2011.08.17] Boku no Tenshi (僕の天使; My Angel)
- [2012.06.06] Japanpan ~Nihon Zenkoku Jimotoka Keikaku~ (ジャパンパン~日本全国地元化計画~)
- [2012.09.26] Ousama Game (王様ゲーム)
- [2013.01.16] Aiai no Uta ~Boku to Kimi to Bokura no Hibi~ (アイアイのうた~僕とキミと僕等の日々~)
- [2013.06.12] Ai wo Abite, Boku ga Iru (愛を浴びて、僕がいる)
- [2013.08.28] Hebereke Sengen (へべれけ宣言)
- [2013.10.30] Mikan Heart (みかんハート)
- [2014.09.24] Owarinaki Rondo (終わりなき輪舞曲)
- [2015.07.01] Party☆King (パーティ☆キング)
- [2015.09.16] Kimi no Kotoba de (キミノ言葉デ)
- [2016.10.26] Hikari to Kage (ヒカリトカゲ)
- [2017.06.07] Y
- [2018.08.15] Drama (ドラマ)
- [2019.08.07] Aa, Uruwashiki Jinsei (嗚呼、麗しき人生)
- [2008.05.13] Sun Son Sound feat. Kusuo
- [2008.06.17] to di Bone
- [2008.06.17] SORRY SORRY feat. MEGA HORN
- [2015.08.11] Party King (Remixes)
- [2011.11.02] CK LIVE!!! A-YANKA!!! Nihon Zenkoku CK Jimotoka Keikaku ~Jimoto Desu. Jimoto Janakutemo, Jimoto Desu Tour 2011~ Tokyo AKASAKA BLITZ Kanzenban (CK LIVE!!! A-YANKA!!! 日本全国CK地元化計画~地元です。地元じゃなくても、地元ですツアー2011~ 東京AKASAKA BLITZ 完全版)
- [2014.06.04] Nihon Zenkoku CK Jimotoka Keikaku ~Jimoto Desu. Jimoto Janakutemo, Jimoto Desu Tour 2014~ (日本全国CK地元化計画~地元です。地元じゃなくても、地元ですツアー2014~)
- [2015.03.11] CK Mubou na Chousenjou in Marine Messe Fukuoka (CK 無謀な挑戦状 in マリンメッセ福岡)
- [2016.02.24] CK Mubou na Chousenjou Case 2 in Ryougoku Kokugikan ~Budou yori mo Muscat! Tawawa ni Shitta Shuukakusai~ (CK 無謀な挑戦状Case2 in 両国国技館 ～ぶどうよりもマスカット!たわわに実った収穫祭)