It depends on the type of issue you're involved in. Back when I lived
in Shinjuku-ku the kuyakusho had someone there once or twice a week to
consult on general questions. I forget if it was specifically for
foreigners or if anyone could get advice there. But in any case they
were very helpful when a dishonest landlord was refusing to return my
shikikin after I moved out... they told me exactly what to do, and it
definitely worked.

So you might check and see.

M