Takashi Hatakeyama (畠山 貴志 Hatakeyama Takashi, born June 18, 1976), better known by his stage name Kreva, or Dr. K, is a Japanese rapper and record producer signed with the Burger Inn Records and Pony Canyon’s Knife Edge labels. He is a solo artist as well as a member of various hip hop groups, including Kick the Can Crew, By Phar the Dopest with fellow MC Cuezero, and a large ensemble of other Japanese hip hop groups in Funky Grammar Unit.

His stage name is derived from the English word “clever”.

Studio albums
Shinjin Kreva (新人クレバ) (2004)
Ai Jibunhaku (愛・自分博) (2006)
Yoroshiku Onegaishimasu (よろしくお願いします) (2007)
Shinzō (心臓) (2009)
Go (2011)
Space (2013)
Uso to Bonnō (嘘と煩悩) (2017)

Extended plays
Oasys (2010)

Compilation albums
Kreva no Best Ban (クレバのベスト盤) (2008)
Japanese Rap Star for USA, Vol. 1 (2011)
BEST ALBUM「KX」(2014)

Remix albums
Best of MixCD No. 1 (2007)
Best of MixCD No. 2 (2012)