National Museum of Nature and Science
In 1972, the National Museum of Nature and Science prepared for researching the ecology of Iriomote cats, and in November 1973 the World Wide Fund for Nature and the Ministry of the Environment conducted a joint preliminary investigation regarding the cat's ecology, and from 1974 the Ministry of the Environment conducted a comprehensive investigation that lasted three years. After that, there were three more investigations beginning in 1982, 1992, and 2005.