The Japanese winger injured his ankle whilst on loan at Wigan Athletic earlier this year and has been working hard to get himself back to fitness in order to play a few games before the campaign ends.
His grit and determination has been hailed by Wenger who feels he is leaving no stone unturned in his quest to return.
"Ryo has been in rehab for the last three weeks. He is doing extremely well. He is the first in and the last out, very focused," he said.