Actually I have no idea. All I know is that when it's tsukimi time, McDonalds rolls out their Tsukimi McBurger (has a round egg on it that resembles a full moon). In my six years in Tokyo, I've never seen anybody observing tsukimi in any other way.
We call the moon on August 15 of old lunar calender (September 11 this year) "Tyusyu no meigetsu."
We put small dango and panpas grasses in a vase on a porch or by a window,and enjoy watching the moon.
This year it will be a full moon.
2006,7,8 is not.It depends on a calender.
The "Reizei" in Kyoro (one of a desandant of noble families since Henan period) is known to hold a traditional celemony of otsukimi every year.