I will not dwell on what happened today in Haneda (there are plenty of news about it everywhere). However, as a consequence, all 4 runways were closed , all departing domestic flights cancelled, all landing flights diverted (to Narita, Ibaraki and even Sendai as far as I know).
ANA and JAL are mentionning they will do their best to reschedule as much as possible but they are asking passengers to check the status of each flight from tomorrow on. As of 9:30pm, three runways have reopened.
JR West announced it will run some extra shinkansens tonight (all non-reserved seats).
Anyway, check with your airline.
by Titibu