Of Japan’s two leading (but not competing) religions, Buddhism gets credit for its interest in serenity and transcendence, while Shinto takes the heat for its martial history. Yet Shinto is fundamentally a nature religion, venerating not violence but creation itself. Learn more about the religion and a related art in today’s program at the National Arboretum: It begins with a visually striking film, Shinto: Nature, Gods, and Man in Japan, which introduces the religion, and concludes with a tour of the arboretum’s world-famed bonsai tree collection, which stresses the Shinto elements of the art of bonsai. At 10 a.m. at the National Arboretum’s Administration Building Auditorium, 3501 New York Ave. NE. Free. For reservations call (202) 245-4521. (Mark Jenkins)