When I was watching Discotek Media’s release of Dororo, partway through the series a title card called “Calpis Manga Theater” was added to the beginning of each episode. As you might imagine, this caught my attention and I quickly found out that the Dororo anime was the first entry in what would become known as World Masterpiece Theater.
World Masterpiece Theater aired on Fuji TV from 1969 to 1997 and then from 2007 to 2009 and typically saw classic works of Western literature adapted into anime series. The title went through several name changes such as the first name I mentioned “Calpis Manga Theater” to “World Masterpiece Theater” to “House Foods World Masterpiece Theater” to name a few.