It is critical to distinguish between legal and illegal access.

Under Article 175 of Japan’s Criminal Code (regarding obscenity), actual genitalia cannot be explicitly shown in commercial media. To comply, producers add pixelated "mosaic" blurring. This is not a suggestion; it is a legal mandate for any JAV produced within Japan.

: The process usually involves frame-by-frame manual adjustment, using inpainting tools if available in the software, or applying AI-based tools designed for such tasks. AI tools can automatically detect and attempt to fill in censored areas based on the surrounding content.

: Refers to a standard high-definition video resolution of 1920x1080 pixels using progressive scanning.

This specific release is categorized under the "Sister-in-law" genre, a common trope in Japanese Adult Video (JAV).

Consider a scenario where a video producer is working on a project that involves encoding and re-distributing a collection of previously produced videos. Upon reviewing the re-encoded videos, the producer notices significant mosaic effects, particularly in areas of high contrast or detailed textures.

Putting it all together, it seems like you might be discussing a high-definition (1080p) video that involves a reduction of mosaic effects (possibly for enhanced viewing or for specific content analysis purposes), associated with Natsu Igarashi and identified by the code FSDSS-617.