Kammala jumla mai zuwa: Yashima ta sami lambar yabo ta farko ta kasa da kasa a gasar zakarun duniya ta matasa ta 1994, inda ta zama ta uku a tseren mita 1500 na mata kusa da Anita Weyermann da Marta Domínguez. Ta shiga manyan mukamai a shekara mai zuwa kuma ta jagoranci tawagar Japan zuwa nasara a gasar tseren tsere ta Asiya ta 1995, tare da Yashima da abokan aikinta Michiko Shimizu da Yasuko Kimura suna share fagen daga a taron a filin gida a Chiba. Wannan wasan kwaikwayon ya sa aka zaɓe ta don
1995 IAAF World Cross Country Championships, inda ta gama ta 69th gaba ɗaya.