Goshi, Hosono, a former secretary general of the Democratic Party of Japan, said Wednesday he will run in the largest opposition party's leadership race on Jan. 18 to pick the successor to outgoing DPJ President Banri Kaieda.Goshi, Hosono, a former secretary general of the Democratic Party of Japan, said Wednesday he will run in the largest opposition party's leadership race on Jan. 18 to pick the successor to outgoing DPJ President Banri Kaieda.