The term oversight is indicative of restriction. In order to ensure the wrong people were not taking money or power, the U.S. chose to oversee the rebuilding of Okinawa. This restricted the pool of people allowed to be successful during this time and is synonymous with economic hampering. The U.S. allowed Okinawa to rebuild, just not as fast as Okinawa could have.
No, the U.S. oversight of Okinawa did not hamper economic development, because the economy in Okinawa is quite good. If anything the U.S. oversight helped Okinawa because the stationing of troops brought a great deal of people who spend money to the local economy. The oversight was to prevent weapons build up. But the economy is fine.
I think US oversight in Okinawa might have actually improved the local economy. The reason for this is because of the infusion of western culture and the meshing it has with local Japanese culture. For whatever reason, they worked well together and continue to work to this day, which is good for the economy.
America's large army base on Okinawa provided a lot of economic activity on the island, so the United States didn't hamper economic development that much. The base did make the economy a bit one-sided. However, in the post-World War II era, the entire island nation needed to be modernized in the first place.
I personally disagree,Okinawa is an island and prefecture which contains the Ryukyu island chain south of Japan which is known for its spectacular views, beautiful rural way of life, regional dialect, and U.S. military influence. Throughout history, different groups administered the islands: local, Chinese, Japanese, and U.S. Their many dialects, known as Ryukyuan, is in the same language family as Japanese, but most young people there speak Japanese. There are many U.S. military bases in Okinawa, which are jointly administered by the U.S. and Japan.