It looks like they are closed down for now:
"The strong wind cut off some electric lines, causing blackouts to some 25,000 household in central Japan, while regional authorities urged dozens of households in central Yamanashi and Gunma prefectures to evacuate, NHK
At Tokyo's Haneda airport, at least 174 flights, almost all scheduled to take off or land in the evening, were canceled, the broadcaster said."
I would expect that they will re-open on Friday, Saturday morning at the latest.
[Edited 2007-09-06 19:56:02]