The Mutual Possession of the Ten Realms Doctrine

These people are those who do not know the difference between the pre-Lotus sūtras and the Lotus Sūtra. They are not only wandering blindly in their own stupidity and ignorance but also closing the Buddha-eye of all living beings. Wishing to be reborn in the Tuṣita Heaven is encouraged in many Hinayāna sūtras. It is also preached in some Mahāyāna sūtras. Many Mahāyāna sūtras encourage the rebirth in the Pure Land of the Utmost Bliss to the West. They are provisional sūtras that are later merged into the One Vehicle teaching in the Lotus Sūtra. According to the teaching of the Lotus Sūtra, both the Tuṣita Heaven and the Pure Land to the West are not separated. Both of them as well as the worlds of humans and gods are contained in the Buddha lands all over the universe. Expounding the mutual possession of the Ten Realms doctrine, the Lotus Sūtra reveals to evil persons the evil doings of the Ten Realms, and at the same time informs them that they are endowed with the five kinds of eyes (human eye, eye of heaven, eye of wisdom, eye of dharma, and the Buddha-eye). This is done in an effort to save even the most wicked among the evil. Regarding women, it can be said that all of the realms are inhabited by women because according to the doctrine of the mutual possession of the Ten Realms, women are included in the Ten Realms. Thus, the enlightenment of women is a reality. Therefore, those who believe in the Lotus Sūtra and seek Buddhahood cannot be led down to the nine realms of delusions by the force of karma.

Ichidai Shōgyō Tai-I, Outline of All the Holy Teachings of the Buddha, Writings of Nichiren Shōnin, Doctrine 3, Page 94