If you are referring to an unofficial streaming or download site using “Blurayku” in its name (common with some regional pirate or fan subtitle sites), I cannot produce a report that would promote, validate, or analyze unauthorized access to exclusive Blu-ray content.
For the uninitiated, the term might sound like niche tech jargon. But for cinephiles and steelbook hunters, "Blurayku" has become a badge of honor. It represents the intersection of high-fidelity Japanese engineering (the "ku" nodding to premium regional specs) and the fiercely guarded world of retailer-exclusive content. blurayku film exclusive
Steelbooks: Metal cases with unique, often commissioned, artwork that are released in limited quantities. If you are referring to an unofficial streaming
Where to Find Blu-rayku Film Exclusive