Rubens Barrichello believes the safety of the Suzuka circuit could use some improvements to bring it up to the current standards.
The Brazilian admitted, however, that the Japanese track is still one of the drivers' favourites.
"It is [on the limit], it's kind of adrenaline all the time, and the drivers love it and appreciate it so much," said Barrichello.
"The work that has been done has helped, but it is still - if you take the esses for example - an old-fashioned circuit that could do with a little more run-off area.
"There are two ways of looking at it. Being a racing driver you end up being a bit mad anyway, so you like to work with that adrenaline and having the walls alongside and so on.
"But for a simple, normal guy, you would like to see more asphalt, because crashes in those areas are not easy ones."
Renault's Robert Kubica agreed with the Williams driver about the safety issues.
"For sure safety is not the highest standard in Suzuka, but that's how it is. You have to take this in mind and make sure you stay on the track," said Kubica.
The Pole claimed, though, that a wet race would not making things much harder for the drivers.
"I wouldn't stay it's more difficult," he said. "I think Suzuka is nicer to drive in the dry because the corners are really, really challenging, and especially the first sector which feels like a roller coaster, going from one corner into another.
"In the wet you go much slower so the G-forces are not so high and you are not going so quick."