Hideo Tarumi (垂秀夫) (born May 23, 1961) is a Japanese diplomat who served as the Ambassador to China, from November 2020 to December 2023.

After graduation, he joined the Ministry of Foreign Affairs after attending Osaka Prefectural Tennoji High School.

After returning to Japan in 1990, he served in the Second Division of the Cultural Exchange Department and the Economic Cooperation Bureau of the Ministry of Foreign Affairs.

Tarumi arrived in Beijing on November 26, but due to COVID-19 pandemic, he was required to stay in two weeks of quarantine.

On April 14, 2021, President of China Xi Jinping accepted Tarumi's credentials at the Great Hall of the People.