Hidemitsu was born in 1980 in Osaka. When he was 26 years old, he moved to France and entered into a directing and producing degree in Paris ESRA film university. When he was a student, he won the award for the Documentary Section of the University Student Competition. This lead him to learn directing from Benoît Jacquot. When he was 30 years old, he worked hard and was selected as an asistant director in "Les Adieux à la reine", directed by Benoît Jacquot. He came back to Japan when he was 31 years old and has been continuing working as an assistant director for many directors including Katsuyuki Motohiro and Masato Harada.