The 26-year-old has agreed fresh terms that will keep him at the Exiles until at least the end of the 2013/2014 season.
Ojo, who has won two England caps, has scored 56 tries in 145 appearances for Irish. He was part of the Churchill Cup-winning England Saxons team during the summer.
Irish head coach Toby Booth said: "Topsy has been a highly consistent player for this club over a number of seasons now, and his commitment to the shirt and to his team-mates is second to none.
"He is a tremendous attacker with ball in hand and an outstanding defender.
"His try-scoring record for the club speaks for itself, and we are certainly very pleased that he has decided his immediate future is with London Irish."
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.