Shakubuku is sharing the truth. Because the Lotus Sutra teaches the truth, it is known as the “teaching of shakubuku.” Now, in the Latter Day of the Law, all our efforts to communicate and spread the greatness of Nam-myoho-renge-kyo—the essence of the Lotus Sutra—constitute shakubuku.

From The Wisdom for Creating Happiness and Peace, part 2, revised edition, p. 244