"It is difficult to say but technically speaking our designs are -- I can't say the number -- but almost based on the same as the Ferrari level of engine," Hasegawa told F1i. "Although we are not achieving that at the moment.
"So if we didn't have the tokens and we were just adding more parts we could achieve that level I think. But currently to achieve this level we need more than 40 or 50 tokens. So that's why we have to wait and have to choose which upgrade will be very effective to close the gap."
Unlike Honda, Mercedes, Ferrari and Renault have all spent at least one token since the beginning of the season, with the latter set to introduce another upgrade in Monaco or Canada after successful tests in Barcelona this week.
Explaining his point further, Hasegawa said: "As a variation point of view I have a lot of [upgrade] options, but it isn't very big so I don't want to choose that kind of option. At the moment I am hesitating from introducing that kind of option by using tokens. That's the reason."
Asked if the upgrades which are ready would already have been introduced if there was no token system in place, Hasegawa replied: "Definitely, yes."
Doing something in my book is better than nothing...