Question: What was the nationality of the band that released the album called Re-maintenance?
Sentence (from "CNBLUE"): The lineup originally consisted of Jung Yong-hwa (leader, guitar, main vocals, rap), Lee Jong-hyun (guitar, vocals), Kang Min-hyuk (drums), and Kwon Kwang-jin (bass), and they released their debut Japanese mini-album "Now or Never" in 2009.
Relevant evidence: No