Alternative rock, emo, pop punk ish music suggestions?

i'm trying to get into more music, but have no idea where to start, my top music is: my chemical romance, panic at the disco, 30 seconds to mars, paramore, linkin park, billy talent, metallica, muse, florence and the machine, foo fighters, and i'm also open to some japanese stuff, e.g. kanon wakeshima...help please! thank yoou :)