Not got all the fancy details like track maps etc, but thought I'd mention that tropical storm Fitow is at risk of hitting the track on Sunday and by then could have developed into a typhoon. Important to epmhasise that there's NO guarantee it'll hit at all, and if it does, it may hit Monday rather than Sunday, but it's certainly a risk (obviously if it does hit and it ends up as a typhoon which it may do, and if it's a direct hit at the wrong time, then it's entirely possible that the race may be cancelled, as obviously a direct hit would likely mean damage, therefore no Monday race (plus Japan is the week after, so again, no chance of a Monday race).
The only way around it I can think of, if it was forecast to hit and cause severe damage on the Sunday, would be to basically totally change the Saturday schedule and have FP3, quali and the race all on the same day, albeit unlikely I know. Anyway, impossible to predict what'll happen at this stage, as proven by Suzuka 2004 where the track was expected to take a direct hit up to a few hours before the scheduled hit (hence the track being closed on the Saturday) and it changing course late on meaning Suzuka got away lightly in comparison to what could've happened. Sunday is the only day at risk of the tropical storm, Friday and Saturday should be ok. Worth keeping an eye on though, as it obviously has the potential to have serious implications.