Japanese animation giant Studio Ghibli is renowned for light-hearted classics like My Neighbour Totoro but 30 years ago it released Grave of the Fireflies, a war anime with a powerful message that still reverberates. Based on Akiyuki Nosaka's 1967 novel and directed by the legendary Japanese animator Isao Takahata who died earlier this month, it tells the story of two orphans and their desperate s