SEOUL — Korean helmer K.T. Kwak is in negotiations to direct a movie adaptation of “Depart the Peninsula,” a bestseller by Japanese novelist Murakami Ryu that posits what would happen if North Korea invaded Japan.South Korea’s Zinisa Film, which produced Kwak’s actioner “Typhoon,” is seeking to set up the picture as a co-production with Japan. Novel drew considerable attention in Japan after its March 2005 release; it was released in Korean translation last month. “Typhoon,” which earned $28 million upon its December release in South Korea via CJ Entertainment, opens Saturday in Japan on 250 screens through Amuse Soft Entertainment. In December, CJ Entertainment announced it had reached an agreement for DreamWorks to release “Typhoon” in North America.