Takahata began his animation career in 1959 at the Toei Animation Company, where he met eventual Oscar victor Miyazaki.
Takahata is said to have been in poor health and suffering from a heart condition since past year.
While many may recognise Studio Ghibli for the imaginative genius of Hayao Miyazaki, it is through his own merit that the lovely, breathtaking humanity that Isao Takahata brought to his films will endure and continue to be celebrated now and forevermore.
The 1988 film is "Grave of the Fireflies", a haunting tale of young siblings trying to survive the bombing of Japan at the end of World War II. In 1985, Takahata, Miyazaki and Toshio Suzuki founded Studio Ghibli. Takahata was reportedly suffering from lung cancer. His best-remembered TV work was "Heidi, Girl of the Alps", that he directed for Nippon Animation. The studio's films also deal with powerful and emotional topics such as environmentalist and the harsh realities of war.
Other notable Takahata films include Only Yesterday and Pom Poko. - Setsuko, Grave of the Fireflies.
Miyazaki also served as a producer on early Miyazaki works such as Nausicaa of the Valley of the Wind (1984) and Castle in the Sky (1986). Takahata confessed to an nearly love-hate relationship with Miyazaki because their works were so different. Based on the classic folktale "The Tale of the Bamboo Cutter", the film was animated with a water-color-like beauty and fluidity seldom seen in commercial animation.
The legendary's animators last film, The Tale of Princess Kaguya, was released in 2013.