Gen Nakatani is a Japanese politician who has served multiple terms as the Minister of Defense. He was Director General of the Japan Defense Agency (now Japan Ministry of Defense) in the first cabinet of Prime Minister Junichiro Koizumi from 2001 to 2002. He was later appointed Minister of Defense by Prime Minister Shinzo Abe in 2014 and again by Prime Minister Shigeru Ishiba in 2024.