I believe it’s Koyo (JTEKT), at least for the front wheel bearings: Toyota’s 43550-47011 is their 3DACF038D-15BR.
Koyo and they make for my bikes and others too similar brand to SKF and others. Hard for me to believe the Prius is special designed raceway or other esoteric design used in this sealed setup but eh. I don't see text descriptions stating so. Many FWD bearings made by same co . With std designs.
Searching for the Toyota part no on Amayama site, there's mention of another Koyo bearing: https://www.amayama.com/en/part/toyota/4355047011
My buddy Yang in Asia who works in supply chain of Automotive industry they're with mostly bearings and suspension parts specd for these class of motor vehicles . Is looking into this very thing for me . I'm interested to know . I would think that most Toyotas with the rear beam suspension would be taking similar types of bearings and hub assys. Actually I would think most of the cars even with the front suspension whether it be an aluminum hub or steel should also be taking similar designed bearings for all the models one would think redesigning one set of bearings for exactly what for one model yeah okay it's possible just not highly plausible not for makers like Toyota and VW they're parts been companies generally speaking.