A secret communist group was formed within the Okinawa People's Party on Okinawa Island in the 1950s during U.S. rule when such organizations were outlawed, according to the latest study by a group of researchers.
The researchers, led by Tetsuro Kato, a professor at Hitotsubashi University, obtained some 70 documents, including handwritten reports and minutes of meetings from relatives of former members of the communist group, or those close to them, proving its existence.
The group said that in addition to the documents, some of which were written in code, a number of people confirmed the existence of the group.
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