From my conversations with Japanese work colleague i think you and Spinner are both correct. Japanese mature aged wives have long been abandoned by their overworked overdrinking husbands who fantasise about young pussy and ignore their wives - sad for both parties.
I have long wondered the same thing. Perhaps these actresses are women who have been abandoned by husbands. Husband is either gone or gets it elsewhere and doesn't care,
I wonder if these women actually tell their husbands what they're doing. I can't imagine the average Japanese man being thrilled about their 50 something wife whoring out making pornography, not to mention slutting it up and enjoying it, or at least looking like she is. Does she sit around the house waiting for the shoe to drop when her husband finds out? What a trip....
I'm guessing she's around 50 - and what a terrific body she still has. Nice firm tits, thick nipples, pretty face. Too bad it's hard to get uncensored porn out of Japan - looks like she's got a nice pussy to enjoy. Sexy mature women in the trailers, too.