Benin and Togo and mideastern Ghana - is commonly called Ìlẹ-Yorùbá or Yorubaland . The Nigeria component comprises today's Ọyọ , Ọ ṣ un , Ogun , Ondo , Ekiti , Kwara , and Lagos states as well as the western part of Kogi state. Geophysically, Yorubaland forms part of a