Many insiders made a link between the new race deal and the fact that Suzuka is owned by Honda, the Japanese carmaker that is returning to F1 in 2015 as McLaren's works engine supplier.
Another part of the deal, it is rumoured, could be Honda ensuring a Japanese driver is on the 2015 grid.
But Soda, president of the Suzuka operator Mobilityland, insists: "That is pure speculation.
"The return of Honda is very important for us, but it would be wrong to say that automatically means a Japanese driver will be at the start," he told Speed Week.
"Of course though it would help us -- in the best of times we had a full house with 160,000 fans," he admitted.
"Of course, we will try do have this again. I expect a lot of synergy with Honda."