Kammala wannan jumla: Koivumaki ya cancanci shiga rukunin mata masu nauyin nauyi (57 kg) a gasar Olympics ta bazara ta 2008 a Beijing, ta hanyar sanya na biyar daga cikin
Gasar Zakarun Duniya ta Judo ta 2007 a Rio de Janeiro, Brazil. Ta isa kawai a zagaye na biyu na farko, inda ta yi hasarar yukos biyu ga Xu Yan na kasar Sin. Saboda abokin hamayyarta ya ci gaba zuwa wasan kusa da na karshe, Koivumaki ta ba da wata dama don lambar tagulla ta hanyar kayar da Lila Latrous ta Algeria, tare da koka da zinare, a wasan farko na sakewa. Abin takaici, ta gama ne kawai a matsayi na tara, bayan da ta yi rashin nasara a karo na biyu da Aiko Sato na Japan, wanda ya yi nasarar zira kwallaye guda biyu da yoko shiho gatame (mat bakwai), a cikin minti uku.