refers specifically to upscaled, remastered, or uncompressed bit-rate versions of older standard-definition (SD) or early high-definition (HD) releases. These are highly prized by collectors seeking optimal visual clarity on modern 4K and OLED displays. The Appeal of "Extra Quality" (EQ) Remasters
This volume features Mei Sawai, a popular figure in the Japanese junior idol scene during the mid-2000s. The "SQ" in the title stands for "Super Quality," and the addition of "Extra Quality" usually indicates a high-definition transfer or a premium printing standard that was a step above standard releases of the era.