[i_am_new_here]

I find it discriminating of you that you distrust any ones ability to do the job. In Japan there are Japanese people. Who should do the job? They of course, why not, they live there. Why shouldn't "some of them" create enough diverse views? What do you want? That people from other countries go to Japan and enrich them? Gentrify and replace them? Will they have/add better perspectives? Will they mix or integrate into the local population while providing more diverse views and creating a more diverse population (also: physically - like "mixed ethnicity babies")?