Kammala wannan jumla: Osano ya yi gasa a Kenya tun yana ƙarami kuma a matsayin matashin ɗan wasa ya shiga cikin ƙungiyar azurfa a gasar
1987 IAAF World Cross Country Championships (wanda mai nasara Wilfred Kirochi ya jagoranta) kafin ya dawo a 1989 don kammala na huɗu kuma ya taimaka wa Kenya zuwa taken ƙungiya tare da masu lambar yabo na mutum Kipyego Kororia da Stephenson Nyamau. Ya lashe lambar yabo ta mutum daya a gasar zakarun duniya ta matasa a shekarar 1988, inda ya shiga tseren kilomita 20, inda ya zama na biyu ga Zeleke Metaferia na Habasha.