Kanie, ranked 332 in the world but seeded sixth after the ranking round, was part of Japan's bronze-medal winning team and followed up this morning with a fine win over Xu Jing.
Xu's China team took silver but she was off-colour in this contest, beaten 6-0 in three sets as Kanie dropped only five points from her nine arrows.
Kanie had earlier beaten Tetyana Dorokhova 7-1, while Xu was a 6-2 victor over Natalia Lesniak.
Mexico's Aida Roman will be Kanie's next opponent on Thursday as she completed successive 6-2 victories.
She saw off Kazakhstan's Ana Bannova first and then knocked out India's Bombayla Devi Laishram.
The USA's world number seven Miranda Leek is out after she slipped to a 6-4 defeat at the hands of Italy's Pia Lionetti in the last 32.
Leek, who placed 14th in the ranking round, defeated Kateryna Palekha 6-2 in the first knockout but was edged out in five sets by Lionetti, who was much improved after a poor showing in the Team event.
Lionetti had earlier ousted South Africa's Karen Hultzer. Chinese Taipei's Tan Ya-Ting is next in the Italian's sights after she booked her place in the next phase.
Dane Carina Christiansen, who showed promise in the Team event, was the fifth woman through to Thursday's knockouts after winning two five-set encounters.
In the men's Individual event, Great Britain's Larry Godfrey will line up in the last 16 after two dominant wins.
Godfrey, who placed fourth in the individual ranking round, swept aside Bangladesh's Emdadul Haque Milon 6-0 in the round of 64.
He then upped his game again to claim a 7-1 victory over Juan Rene Serrano.