Osano akakwikwidza kuKenya achiri mudiki uye semutambi wechidiki akagovana sirivheri muchikwata pa1987 IAAF World Cross Country Championships (inotungamirwa nemukundi Wilfred Kirochi) asati adzoka muna 1989
kuti vapedze vari vechina uye vabatsire Kenya kuhwina mukombe wechikwata pamwe chete nevakakunda menduru vari voga Kipyego Kororia naStephenson Nyamau. Akakunda menduru yemunhu mumwechete pa1988 World Junior Championships muAthletics, achipinda mumakwikwi e20K, kwaakange ari mumhanyi wechipiri kuEthiopia's Zeleke Metaferia.