Ogawa Heikichi graduated from Law Department, Tokyo University (1892).
Ogawa Heikichi entered the bar, became secretary-general of the Toa Dobunkai, an organization for promotion of Sino-Japanese cooperntion, and a director of the Nanyo Kyokai (South Seas Association). He elected to the House of Representatives 10 times (since 1903), became a leader of the Seiyukai Party. Ogawa was appointed Justice Minister in the Takahashi Cabinet (1925) and Railway Minister in the Tanaka Cabinet (1927). Retired from political life because of involvement in a railway scandal.