Question: Who is a songwriter and musician as well as lead singer, Minoru Niihara or Robert Plant?
Sentence (from "Minoru Niihara"): Minoru Niihara (二井原 実 , Niihara Minoru ) (born March 12, 1960 in Osaka, Japan) is the original and current lead singer of the Japanese heavy metal band, Loudness.
Relevant evidence: Yes