Yui Hatano is losing steam in Japan despite the multiple releases every month. Young girls like yua and shoko is overtaking her and is not a temporary thing. She can make a decent career in Asian countries like sora aoi, maria, saori, and anri okita after retirement. Wealthy businessmen and stage/club offers are endless.Don't trust numbers posted in articles--especially those sky-high bonuses studios report when they snag a C-list celeb. These are private companies. They can say whatever they want.
I'm sure a busy and popular actress like Yui Hatano would be making (very) low 7-figures USD a year and any actress who regularly stars in titles (1-2 a month) should be putting in very very low 6-figures USD a year. Saving and wisely investing the money's another story.
Even Shimiken earns 20,000 usd a week despite being a guy.(well, he's like the new kato).
http://www.gq.com/story/shimiken-japanese-porn-star-interview http://www.cosmopolitan.com/sex-love/news/a37302/this-is-the-most-famous-guy-in-japanese-porn/
The article also mention New av actors earn very little(I assume is as much as mcdonald employee) and need to do some nasty scenes. Today AV industry is very different. AV actresses are snarter and don't hide themselves instead they compete to over promote and expose themselves for more opportunities. Yui Hatano gain fame after 2 years in AV before people compare her to a Taiwanese movie star. She should be earning millions every year. A lot of av actresses brag about their luxurious clothing on social media.