One year after Jules Bianchi's tragic accident, Japanese Grand Prix bosses have installed porous asphalt stripes and 'U' drains on the edges of the circuit at several corners in order to improve drainage and visibility.

However, after two wet practice sessions on Friday, Massa said the problem is still there.

"No," Massa said when asked by Motorsport.com is the situation had improved after the changes.

"I think when it's raining and there's a lot of water, the aquaplaning is the main issue for me on this track, so I don't think so.

"It's not easy to remove. You can even see on television there are a lot of rivers.

"This has always been a problem with this track since I started and I really don't see any improvement."

Red Bull's Daniel Ricciardo also said the rivers on track were as bad as last year when the track was at its wettest this morning.

"This afternoon when I went out it wasn't so wet, so there weren't any rivers, but this morning on the install lap, the rivers were pretty much the same as last year," Ricciardo said.

"Nothing obvious for me, but most of us stayed on the track, so maybe that's something!"