These are screenshots. With R18 now gone since January 2023. They being the largest JAV website and network out there. And without a company listed in the upper right corner of these pictures. It will be almost impossible to identify what film this is.
Try putting these pictures into Yandex and Tineye. See what comes up.
Now if you had a production number for the film, you could take that number and track it. All over the internet and onto Japanese porn forums.
Good luck.