Thank U is the first studio album and Japanese release by the South Korean rock band CNBLUE.

The album was released on March 20, 2010 in Japan and the majority of the songs were sung in English with the exception of "voice" and "a.ri.ga.tou.

This album is the first of the two indie albums CNBlue released before signing with Warner Music Japan for their major Japanese debut on October 19, 2011.

Several songs were written by leader, lead vocalist, and rhythm guitarist Jung Yong-hwa and lead guitarist and vocalist Lee Jong-hyun.

All of the tracks with the exception of "Intro" and "a.ri.ga.tou" were previously released pn their EPs Now or Never and Voice.