The fourth installment of the Fatal Frame series was developed for the Wii in co-production with Grasshopper Manufacture. Tentatively titled Fatal Frame IV: Mask of the Lunar Eclipse and published by Nintendo.
10 years prior to the events of the game, five young girls were kidnapped by You Haibara, a criminal, from a mysterious sanatorium on Rougetsu Island. They were eventually rescued by Choushiro Kirishima, a detective pursuing the criminal. Several years after the incident, two of the girls (Marie Shinomiya and Tomoe Nanamura) died mysteriously. The three remaining girls, Misaki Asou, Ruka Minazuki and Madoka Tsukimori, now 17 years old, return to the island to recover their lost memories and find out more of what happened that day. Choushiro continues to pursue Haibara, as well as aiding Ruka along the way.
The game was released in Japan on July 31, 2008, and so far sold around 75.000 copies making it the best sold game of the series in Japan. There are no plans for a western release, despite various claims of fans. However, an unofficial English translation patch has been released.