Even though he was born in the United States, artist Roger Shimomura still gets asked where he’s from. Or he’s told that he speaks English really well. “The presumption is that if you’re Asian, you must be foreign to this country,” he told host Gina Kaufmann on KCUR’s Central Standard . Shimomura, a Lawrence-based artist, has explored the issues of ethnic identity during his long career. He has paintings and prints in more than 90 museums nationwide, including the Metropolitan Museum of Art in