The Fuji Speedway circuit may give up next year's Japanese Grand Prix due to financial reasons.
Fuji, owned by car maker Toyota, replaced Suzuka as the home of the Japanese race in 2007, but a spokesman for the manufacturer told news agency Reuters that it was considering pulling the plug on the race.
"(Fuji's company) FISCO tell us they are taking various elements into account in their consideration towards hosting next year's Japanese Grand Prix," Toyota's Paul Nolasco said.
Honda's Suzuka circuit hosted the Japanese Grand Prix from 1986 to 2006 and will return to the calendar this season as it alternates hosting the race with Fuji on a yearly basis.
Honda left Formula 1 at the end of last year in order to save costs.