This is the most operationally significant part of the keyword. "Checked" appended to an .rar file is not a default file extension; it is a . In digital scannering and archiving communities, "Checked" indicates one or more of the following:
Thus, "Rikitake No.119 Shoko Esumi.rar Checked" translates to: "The 119th item from the Rikitake collection, containing materials related to Shoko Esumi, compressed in RAR format, and verified for integrity and safety." Rikitake No.119 Shoko Esumi.rar Checked