At the Okayama branch of the Animate store chain today they have posted a photograph that will be shown later in the article of a promotional signboard which confirms the second movies release date. The second movie which is titled Kizumonogatari II: Passionate Blood will release in Japan on August 19th. Mind you that the first film Kizumonogatari I: Iron and Blood released in Japanese theaters on January 8th an dalso had a US release in several locations. The film series is a trilogy for those that did not know starting with the first film Kizumonogatari I: Blood and Iron, the second film Passionate Blood and the final film Cold Blood. The website for the film is in the following link which debuted back in 2011:http://www.kizumonogatari-movie.com/. The film is a prequel to the entirety of the series set before Bakemonogatari and the upcoming movie adapts source material from the Monogatari series first season light novel. The light novel would release 6 volumes between the dates of November 1st 2006 and July 28th 2010 and Vertical released the novel in English this year.
Below is a plot summary of the series quoted from MAL:
The story centers on Koyomi Araragi, a third year high school student who has recently survived a vampire attack, and finds himself mixed up with all kinds of apparitions: gods, ghosts, myths, and spirits.