Yukio Okamoto (, "Okamoto Yukio"; November 23, 1945 – April 24, 2020) was a Japanese diplomat and analyst. He was a known political analyst for Japan–United States relations. He was a diplomatic advisor and analyst for several Japanese prime ministers, including Ryutaro Hashimoto from 1996 to 1998 and Junichiro Koizumi from 2003 until 2004. He was born in Kanagawa Prefecture, Japan.