The term is most heavily used in the Japanese AV industry.

Cospuri is a word that feels like a coin you discovered between couch cushions: odd, a little mysterious, and unexpectedly delightful. It doesn’t have a widely agreed-upon dictionary definition, but that’s part of its charm—cospuri can be whatever small, charming thing you need it to be. Below is a playful, evocative blog post that leans into that feeling: part personal essay, part microfiction, and part invitation to notice the small mischiefs that brighten ordinary days.

If you meant "cosplayers" or something related to cosplay, here is some general information:

Cospuri content typically includes: