The Supreme Court is expected next week to uphold a lower court ruling endorsing the government's decision not to disclose diplomatic documents about the 1972 reversion of Okinawa from U.S. control, judicial sources said Monday.

The top court is likely to reject an appeal over the Tokyo High Court's September 2011 decision that nullified

The Tokyo District Court ordered the government to release documents that showed there was a secret accord for Japan to shoulder part of U.S. costs for the reversion, but the Tokyo High Court nullified this in September 2011.