Sadakichi Odajima graduated from English Literature Department of Waseda University (1916).
Sadakichi Odajima entered Manchoho Newspaper (1917). Transferred to Chugai Shogyo Shimpo (Qommercial News) (1918) and after successive promotions became its director (1942). After the newspaper was renamed Nilum Keizai Shimbun (1946) was appointed its president (1948) and chief director of Kyodo Tsiishinsha (Kyodo News Agency). Attended the ceremony of the 100th Anniversary of the founding of Reuters News Agency (1951) and then toured Europe and America.