Japanese on LetMeJizz
Plenty of people expect the blurred-out mosaic and loud overacting, and a fair bit does come censored with theatrical reactions, but the range runs far wider than that. You get everything from soft amateur tapes to wild scripted productions, all carrying that distinct JAV pacing and over-the-top dialogue. The censorship throws newcomers off, but the variety underneath is massive.
95 japanese videos here, all HD and all free. New ones go up daily, so check back if you don't find your scene first time around.