The Haunted Mansion closes late summer/early fall to get its overlay, ready for the start of Disney's Halloween at Tokyo Disney Resort.
Once installed, the Mansion is completely transformed, and becomes a totally different attraction unto itself. The scenes can vary slightly year to year, giving you a different experience every time.
Haunted Mansion Holiday Nightmare runs all the way through to the end of Christmas Season. Dates can vary from year to year. At that time, the Mansion will close once again, and the regular version will resurface a few weeks later.
Disney's FastPass service is normally available at this attraction. Check on the day of your visit.