"Shinji is the ultimate professional on and off the field and the ultimate gentleman. He will leave us with long lasting memories of his time with our club," said Wanderers chief executive Lyall Gorman.
"He is committed to the Wanderers until the end of his contract in May this year which will see him help lead our club in its 2014 Asian Champions League debut and hopefully a second Hyundai A-League Finals Series.
"Shinji Ono will forever be remembered in our Club folklore and on behalf of the entire Wanderers family we look forward to making the final months of his time in Australia with the Wanderers a memorable one.
"He will always be a part of the Wanderers family and story as history records it over time. We wish him every success in his return to his homeland and thank him for his incredible contribution to our club's birth and journey thus far."
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