Let’s Learn Japanese is a video-based Japanese language study course for English speakers produced by The Japan Foundation. It consists of 52 video lessons, divided into two parts (Basic I and Basic II). Each part consists of 26 episodes, and the episodes explain grammatical structures, new words and cultural information about Japan.
According to Wikipedia, the first part (Basic I) was made in the mid 1980’s, and the second part (Basic II) was created in the mid 1990’s as a video-based Japanese language study course for English speakers. And all episodes of both parts were aired on television.