It's not about what her fans want.
She has been a JAV actrees for 11 years, and that's an eternity in this business.
Akiho has remained popular throughout her career, and she is a contract stars for two studios (S1 and Maxing), neither of them specialising in hardcore themes like anal or nakadashi.
If she hasn't done it at this point in her career, she's not doing it period.