Maria Ozawa probably won't be making a comeback anytime soon. If one believes the numbers...
http://www.worldsrichpeople.com/richest-pornstars.html
Maria Takagai is getting paid.
http://www.celebritynetworth.com/articles/entertainment-articles/20-richest-porn-stars/
yeah for her activities outside of the jav industry Maria Ozawa she legit has zero reason to ever come back unless she gets a massive payment for it, she's pretty set