Those who intend to spread Buddhism must correctly understand the five principles for propagation in order to disseminate the True Dharma. They are: (1) the teaching, (2) the capacity of the people, (3) the time, (4) the country, and (5) the sequence of spreading the Buddha’s teachings.

Ken Hōbō-shō, A Clarificaton of Slandering the True Dharma, Writings of Nichiren Shōnin, Doctrine 3, Pages 123.