五島列島
Okada was born on November 8, 1987, in Anjō, Aichi. As a child, he lived and attended a primary school in Anjō. However, before completing primary school, Okada was lured by the nature in his mother's hometown in the Gotō Islands in Nagasaki Prefecture and chose to complete the rest of his primary education in a special boarding school there. Upon graduation, he returned to Anjō.