Looks like the deal is for between $750,000 and a $1 million dollars. He turned down 2 year deals from the Nationals and Pirates.

http://msn.foxsports.com/mlb/story/6400990

Blue Jays, Ohka agree on one-year deal
The Blue Jays, adding another piece to their starting rotation, have reached preliminary agreement with free-agent right-hander Tomo Ohka on a one-year contract, FOXSports.com has learned.

The size of the contract was not immediately known, but it is believed that Ohka will receive between $750,000 and $1 million. The deal will not become official until Ohka passes a physical. He missed more than two months with the Brewers last season due to a partial tear of his right rotator cuff.

The addition of Ohka, 30, will give the Jays five veterans for their rotation — right-handers Roy Halladay and A.J. Burnett, left-hander Gustavo Chacin and righties Ohka and John Thomson. Righties Casey Janssen and Shaun Marcum, both 26, are among the other rotation options.

Ohka's agent, Jim Masteralexis, said that the pitcher turned down two-year offers from the Nationals and Pirates because he wanted to re-establish himself with a contender and re-enter the free-agent market next off-season.

"We think that it's important to get him to a club that is competitive and that has a good offense," Masteralexis told FOXSports.com. "He has never had run support in his career. The A.L. East is a tough place to pitch, but we think Tomo will prove that he is healthy and that he can compete at the highest level."