 Oyama Chojo, former long-term mayor of Koza/Okinawa City, wrote a best-selling book "Okinawa Dokuritsu Sengen" (A Declaration of Okinawan Independence), and stated that Japan is not the fatherland of Okinawa.The Okinawa Jichiro (Municipal Workers Union) prepared a report about measures for self-government.Some considered the autonomy and independence of Okinawa to be a reaction to Japanese "structural corruption", and made demands for administrative decentralization.