From 1977 to 1985 Sanrio, of Hello Kitty fame, attempted to make anime movies for an international audience. (AniPages Daily has an interesting look at the subject here). One of the productions from this period was the 1978 remarkably dark children's anime movie film adaption of Anpanman creator Takashi Yanase's Ringing Bell. Thanks to Discotek, the movie will be returning to North America in DVD release planned for 2014.
Discotek previously released Sanrio's 1981 The Sea Prince and the Fire Child and their Unico movies.