This is a Japanese B4 Speed Poster (10.1" x 28.7") for the 1971 Japanese anime series Tensai Bakabon (天才バカボン), also known as The Genius Bakabon. Produced by Tokyo Movie and distributed by Toho, it promoted a theatrical release during the Toho Champion Festival in 1972. 

Tensai Bakabon (天才バカボン; lit. "Genius Bakabon") is a Japanese manga series written and illustrated by Fujio Akatsuka, which began publication on April 9, 1967, in Weekly Shōnen Magazine. It is about the misadventures of a dim-witted boy (Bakabon) and his idiotic father, the latter of whom eventually becomes the central character.It has been adapted into five anime television series. The first two series produced by Tokyo Movie were broadcast in the 1970s for 40 and 103 episodes respectively. The third and fourth series were produced by Studio Pierrot and broadcast in 1990 and 1999–2000, for 46 and 24 episodes respectively. The fifth series was produced by Pierrot+ and broadcast for 12 episodes in 2018.

The large red and green text reads 天才バカボン (Tensai Bakabon). The orange text at the bottom says 別れはつらいものなのだ (Wakare wa Tsurai Mono na no da), which translates to "Parting is a Painful Thing". This refers to a specific 14-minute short film or episode released in theaters on July 22, 1972.