Jem Aswad Senior Music EditorRina Sawayama’s self-titled debut album is indisputably one of the most innovative pop records of recent years, a head-spinning fusion of nu-metal, Lady Gaga-style pop and ballads that is catnip for critics, fans of daring music (such as her big fan Elton John) and prestigious awards like the Brits and Mercury Prize.So there was no small outcry when Sawayama, 30, who was born in Japan and is not a British citizen but has lived in the U.K.