Japanese airport locations

The state/province name is wrong for almost all japanese airports.  Kanto is not a state, rather a region comprised of many prefectures.  Kyushu, Shikoku, and Honshu are island names, not prefecture/state names.  For example, HND is in the Tokyo prefecture, while NRT is in the Chiba prefecture.  Okinawa and Hokkaido are fine, as they are actual prefecture names.