Not the best film quality but I love this big tittied plump J-girl. She's got other stuff on this site though without top billing (you can't find her on a search). One of her vid's involves an orgy with all sorts of action, can't remember the name and it doesn't show on a search with her name.
Observation from a guy who has watched a lot of Japanese porn: Most of the time it's because they're really sensitive and it causes them to squeal when they cum or get fucked intensely (a.k.a. the good ol' jackhammer method). The cries of some English-speaking women also get higher pitched when things heat up so it's not just Japan.
Cute gal with a fine pair. Don't know why, but Japanese gals seem to whimper or cry while getting fucked. This gal obviously enjoyed herself when she sucked on his dick to clean him up and gave us a smile.