"Keiko" is the name of the amateur or professional actress featured in this specific release. Technical Quality (720p High Quality) Resolution: 720p indicates a High Definition (HD) resolution of
Media from these series often follows a standardized naming format to help collectors and databases categorize content: 1000giri 130614 keiko 720 high quality
The terms you've provided could relate to various things within anime, video production, or other media: "Keiko" is the name of the amateur or