It is not difficult for any one to become a Bodhisattva, or even a Buddha. Women, too, may succeed, in spite of the exceptional difficulty which popular Buddhist teaching attributes to the female sex in such a quest. Why, even a female dragon is said to have attained to Buddhahood; and if that is true, why not a female human bing? Devadatta became a Buddha in spite of his infernal character. Why, then, not another man?
Doctrines of Nichiren (1893)