It might be good to say your nationality so people know what point of view you are coming from. (You are Japanese?)
The only Japanese music I recall getting any airplay in my region (central Canada) is Puffy AmiYumi (PUFFY).
Japanese music I have in my collection is of Nobou Uematsu.
In USA and Canada we tend to only listen to English language music because of isolation from other languages and cultures.
Some concerts from various countries can be viewed online if one searches. Someone else would be better at suggesting musical acts.