Asahiyama Zoo, in Hokkaido, is facing a financial crisis and the zoo director and keepers try everything to save the zoo from closing down.

Japan’s oldest lion, Oto, died on Monday at the age of 25, which is equivalent to a century in human years. Born in 1999 in Hokkaido’s Asahiyama Zoo, Oto had lived in the Toyohashi Zoo and Botanical ...